I get this error whenever a user opens a post in one of my forums:

AssemblyVersion: 04.05.05
PortalID: 0
PortalName: MySite
UserID: 2
UserName: admin
ActiveTabID: 63
ActiveTabName: Insiders
RawURL: /Insiders/tabid/63/Default.aspx
AbsoluteURL: /Default.aspx
AbsoluteURLReferrer:
UserAgent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: 2c40e978-3df7-4ff2-b616-b11f976393d5
InnerException: Object cannot be cast from DBNull to other types.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: System.DBNull.System.IConvertible.ToInt32
StackTrace:
Message: System.InvalidCastException: Object cannot be cast from DBNull to other types. at System.DBNull.System.IConvertible.ToInt32(IFormatProvider provider) at System.Convert.ToInt32(Object value) at DotNetNuke.Modules.Forum.ForumController.ModuleGetAll(Int32 PortalID, String Type)
Source:
Server Name: DEDI531

It doesn't seem to happen with any other modules on my site.  I recently deleted the Smileys and Images pages from the Gallery that get attached to the forums.  I tried reinstalling them but that didn't help.  I have already posted this problem in the Forum Project Forum but, so far, no help.

The other thing I have done recently is install Snapsis Pageblaster, but uninstalling that didn't help, either.

Any ideas?

What version of the Forum Module you are using?

What DatabaseOwner have you?

Have set both connectionString in the web.config before install?

Is it an update from a previos version (DNN and Forum module)?

Have you check the eventlog that is showing up after update?  From what version do you this Update?

All Databases have a Owner and can have some users.  So it is ffor us to know are the user and owner different, and is the DatabaseOwner the dbo ?