I managed to get into the Event Log via an SQL manager.
I can't find a way to attach the entire error entry here, but the significan line appears to be:

"System.Web.HttpParseException: The file '/dotnetnuke/Portals/0/Skins/PCCC/Admin/Skins/Logo.ascx' does not exist."

Which is true - in fact the entire /Portals/0/Skins/ directory is empty.
I currently have 3 skins loaded and the PCCC skin was deleted weeks ago.

I'm not sure I understand what the purpose of the /0/ Portal is - I thought I was using the /_Default/ Portal.

Any thoughts on how to fix this short of a re-install would we very appreciated.  I'm finding DNN to be horribly fragile and getting pretty frustrated.

Sebastian,

I'd love to check the Host or Site settings - but if you read my original problem - I can't get into ANY of the Admin or Host pages.

Is there any way I can look for this information in the SQL data?  What table defines what Skins and Containers are used in Admin?
I can't seem to find any reference and I've been through all the tables in the database.

Buddy

Chris,

Thanks for the suggestion.  I looked in the table and all of the admin and host tabs are marked as Secure.  But changing them didn't seem to solve the problem.  In fact, one of the only tabs I can get into in the Host section is the Host Settings tab - yet it has the same settings as tabs I can't get into.

One other interesting thing I noted from the log files.  The last event to happen right before this problem began (and I mean RIGHT before it began) as this:

<LogProperties><LogProperty><PropertyName>ModuleId</PropertyName><PropertyValue>-1</PropertyValue></LogProperty><LogProperty><PropertyName>ModuleDefId</PropertyName><PropertyValue>-1</PropertyValue></LogProperty><LogProperty><PropertyName>FriendlyName</PropertyName><PropertyValue>User Registration</PropertyValue></LogProperty><LogProperty><PropertyName>ModuleControlSource</PropertyName><PropertyValue>DesktopModules/Admin/Security/ManageUsers.ascx</PropertyValue></LogProperty><LogProperty><PropertyName>AssemblyVersion</PropertyName><PropertyValue>5.4.2</PropertyValue></LogProperty><LogProperty><PropertyName>PortalID</PropertyName><PropertyValue>0</PropertyValue></LogProperty><LogProperty><PropertyName>PortalName</PropertyName><PropertyValue>Peachtree Corners Christian Church</PropertyValue></LogProperty><LogProperty><PropertyName>UserID</PropertyName><PropertyValue>-1</PropertyValue></LogProperty><LogProperty><PropertyName>UserName</PropertyName><PropertyValue /></LogProperty><LogProperty><PropertyName>ActiveTabID</PropertyName><PropertyValue>36</PropertyValue></LogProperty><LogProperty><PropertyName>ActiveTabName</PropertyName><PropertyValue>Home</PropertyValue></LogProperty><LogProperty><PropertyName>RawURL</PropertyName><PropertyValue>/dotnetnuke/Home/tabid/36/ctl/Register/Default.aspx?returnurl=%2fdotnetnuke%2fHome%2ftabid%2f36%2fDefault.aspx</PropertyValue></LogProperty><LogProperty><PropertyName>AbsoluteURL</PropertyName><PropertyValue>/dotnetnuke/Default.aspx</PropertyValue></LogProperty><LogProperty><PropertyName>AbsoluteURLReferrer</PropertyName><PropertyValue>http://www.peachtreecornerscc.org/dotnetnuke/Home/tabid/36/ctl/Register/Default.aspx?returnurl=%2fdotnetnuke%2fHome%2ftabid%2f36%2fDefault.aspx</PropertyValue></LogProperty><LogProperty><PropertyName>UserAgent</PropertyName><PropertyValue>Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.10) Gecko/20100504 Firefox/3.5.10</PropertyValue></LogProperty><LogProperty><PropertyName>DefaultDataProvider</PropertyName><PropertyValue>DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider</PropertyValue></LogProperty><LogProperty><PropertyName>ExceptionGUID</PropertyName><PropertyValue>dc26a3b1-bce3-410c-b162-48597b70d326</PropertyValue></LogProperty><LogProperty><PropertyName>InnerException</PropertyName><PropertyValue>Mailbox name not allowed. The server response was: sorry, your mail was administratively denied. (#5.7.1)</PropertyValue></LogProperty><LogProperty><PropertyName>FileName</PropertyName><PropertyValue /></LogProperty><LogProperty><PropertyName>FileLineNumber</PropertyName><PropertyValue>0</PropertyValue></LogProperty><LogProperty><PropertyName>FileColumnNumber</PropertyName><PropertyValue>0</PropertyValue></LogProperty><LogProperty><PropertyName>Method</PropertyName><PropertyValue>System.Net.Mail.MailCommand.CheckResponse</PropertyValue></LogProperty><LogProperty><PropertyName>StackTrace</PropertyName><PropertyValue /></LogProperty><LogProperty><PropertyName>Message</PropertyName><PropertyValue>DotNetNuke.Services.Exceptions.ModuleLoadException: Mailbox name not allowed. The server response was: sorry, your mail was administratively denied. (#5.7.1) ---> System.Net.Mail.SmtpException: Mailbox name not allowed. The server response was: sorry, your mail was administratively denied. (#5.7.1)   at System.Net.Mail.MailCommand.CheckResponse(SmtpStatusCode statusCode, String response)   at System.Net.Mail.MailCommand.Send(SmtpConnection conn, Byte[] command, String from)   at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, SmtpFailedRecipientException& exception)   at System.Net.Mail.SmtpClient.Send(MailMessage message)   at DotNetNuke.Services.Mail.Mail.SendEmail(String fromAddress, String senderAddress, String toAddress, String subject, String body)   at DotNetNuke.Services.Mail.Mail.SendMail(UserInfo user, MessageType msgType, PortalSettings settings)   at DotNetNuke.Entities.Modules.UserModuleBase.CompleteUserCreation(UserCreateStatus createStatus, UserInfo newUser, Boolean notify, Boolean register)   at DotNetNuke.Modules.Admin.Users.ManageUsers.UserCreateCompleted(Object sender, UserCreatedEventArgs e)   --- End of inner exception stack trace ---</PropertyValue></LogProperty><LogProperty><PropertyName>Source</PropertyName><PropertyValue /></LogProperty></LogProperties>

And one other interesting entry as I was testing tonight - that I don't know how to interpret:

<LogProperties><LogProperty><PropertyName>AssemblyVersion</PropertyName><PropertyValue>5.4.2</PropertyValue></LogProperty><LogProperty><PropertyName>PortalID</PropertyName><PropertyValue>0</PropertyValue></LogProperty><LogProperty><PropertyName>PortalName</PropertyName><PropertyValue>Peachtree Corners Christian Church</PropertyValue></LogProperty><LogProperty><PropertyName>UserID</PropertyName><PropertyValue>-1</PropertyValue></LogProperty><LogProperty><PropertyName>UserName</PropertyName><PropertyValue /></LogProperty><LogProperty><PropertyName>ActiveTabID</PropertyName><PropertyValue>36</PropertyValue></LogProperty><LogProperty><PropertyName>ActiveTabName</PropertyName><PropertyValue>Home</PropertyValue></LogProperty><LogProperty><PropertyName>RawURL</PropertyName><PropertyValue>/dotnetnuke/default.aspx</PropertyValue></LogProperty><LogProperty><PropertyName>AbsoluteURL</PropertyName><PropertyValue>/dotnetnuke/default.aspx</PropertyValue></LogProperty><LogProperty><PropertyName>AbsoluteURLReferrer</PropertyName><PropertyValue /></LogProperty><LogProperty><PropertyName>UserAgent</PropertyName><PropertyValue>Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/533.16 (KHTML, like Gecko) Version/5.0 Safari/533.16</PropertyValue></LogProperty><LogProperty><PropertyName>DefaultDataProvider</PropertyName><PropertyValue>DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider</PropertyValue></LogProperty><LogProperty><PropertyName>ExceptionGUID</PropertyName><PropertyValue>7753af5a-e336-4012-b73e-3aa04cb194ac</PropertyValue></LogProperty><LogProperty><PropertyName>InnerException</PropertyName><PropertyValue>The file 'd:\hosting\userpccc\dotnetnuke\Portals\0\Cache\Modules\81_ACABA51644A302FBB325E30E7931BAF8.data.resources' already exists.</PropertyValue></LogProperty><LogProperty><PropertyName>FileName</PropertyName><PropertyValue /></LogProperty><LogProperty><PropertyName>FileLineNumber</PropertyName><PropertyValue>0</PropertyValue></LogProperty><LogProperty><PropertyName>FileColumnNumber</PropertyName><PropertyValue>0</PropertyValue></LogProperty><LogProperty><PropertyName>Method</PropertyName><PropertyValue>System.IO.__Error.WinIOError</PropertyValue></LogProperty><LogProperty><PropertyName>StackTrace</PropertyName><PropertyValue /></LogProperty><LogProperty><PropertyName>Message</PropertyName><PropertyValue>System.IO.IOException: The file 'd:\hosting\userpccc\dotnetnuke\Portals\0\Cache\Modules\81_ACABA51644A302FBB325E30E7931BAF8.data.resources' already exists.   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)   at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy)   at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access)   at DotNetNuke.Services.ModuleCache.FileProvider.SetModule(Int32 tabModuleId, String cacheKey, TimeSpan duration, Byte[] output)</PropertyValue></LogProperty><LogProperty><PropertyName>Source</PropertyName><PropertyValue /></LogProperty></LogProperties>