Hi,

 I had gotten DNN 4.x  installed and worked on my Win 2003 server with SQL server 2000. I added all the users and settings. Then I changed some server settings, added it to a domain and created a file server. Now when I try to access the site I get the following error.

Invalid URI: The hostname could not be parsed.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.UriFormatException: Invalid URI: The hostname could not be parsed.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. 

Stack Trace:

[UriFormatException: Invalid URI: The hostname could not be parsed.]
   System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind) +1647482
   System.Uri.CreateUri(Uri baseUri, String relativeUri, Boolean dontEscape) +31
   System.Uri..ctor(Uri baseUri, String relativeUri) +34
   System.Web.HttpResponse.ConvertToFullyQualifiedRedirectUrlIfRequired(String url) +289
   System.Web.HttpResponse.Redirect(String url, Boolean endResponse) +115
   DotNetNuke.HttpModules.UrlRewriteModule.OnBeginRequest(Object s, EventArgs e) +3758
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +92
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64