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HomeHomeGetting StartedGetting StartedInstalling DNN ...Installing DNN ..."Unable to cast" error in Install DNN on Vista, IIS 7.0"Unable to cast" error in Install DNN on Vista, IIS 7.0
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3/11/2009 4:55 PM
 
Bill Dameron

Joined: 5/15/2008
Posts: 2

DNN newbie.  I'm hitting a wall on this one, can't find these objects and methods in Install or Install Wizard.  I believe I have followed the various configuration guides, including Sellers'. 

The install produces no output screen, blows on:

 "System.InvalidCastException: Unable to cast object of type 'System.Web.Configuration.ScriptingAuthenticationServiceSection' to type

'System.Web.Configuration.ScriptingAuthenticationServiceSection"

DNN 5.0.1 Install version, new install, Vista, IIS 7.0, SQL Express 2008.  Stack trace is:

[InvalidCastException: Unable to cast object of type 'System.Web.Configuration.ScriptingAuthenticationServiceSection' to type 'System.Web.Configuration.ScriptingAuthenticationServiceSection'.]
   System.Web.Configuration.ScriptingAuthenticationServiceSection.GetConfigurationSection() +39
   System.Web.Security.AuthenticationService.EnsureConfigLoaded() +64
   System.Web.Handlers.ScriptModule.ShouldSkipAuthorization(HttpContext context) +82
   System.Web.Handlers.ScriptModule.AuthenticateRequestHandler(Object sender, EventArgs e) +52
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +68
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75

 Help would be appreciated.

 
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3/16/2009 11:45 AM
 
Bill Dameron

Joined: 5/15/2008
Posts: 2

I don't understand the cause, but following the following procedure seemed to get me past this problem and  into the install:

http://www.adefwebserver.com/DotNetNukeHELP/DNN4_DevelopmentEnvironment_noIIS/ 

This got my install working even though I am using IIS and DNN 5.  The trick seems to be opening the root of the DNN directory using Visual Web Developer Express 2008. 

 

 

 

 
 
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3/18/2009 12:41 PM
 
Ted Hogan

Joined: 11/7/2003
Posts: 20

The page you reference does not include any useful steps toward solving this problem that I can see...

Can you be more specific about how you solved the problem?

 

Bill Dameron wrote

I don't understand the cause, but following the following procedure seemed to get me past this problem and  into the install:

http://www.adefwebserver.com/DotNetNukeHELP/DNN4_DevelopmentEnvironment_noIIS/ 

This got my install working even though I am using IIS and DNN 5.  The trick seems to be opening the root of the DNN directory using Visual Web Developer Express 2008. 

 

 

 

 
 
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3/18/2009 1:01 PM
 
Ted Hogan

Joined: 11/7/2003
Posts: 20

 I solved the problem for me. The cause was having parent web.config files that were setup for .net 3.5. Once I deteled the parent web.confg's (I didn't need them anyway), it worked fine.

If your web server is setup with the .net 3.5 framework, you need to make sure that there are no web.config files set for 3.5 above yours in the file hierarchy. (i.e., D:\inetpub\wwwroot\mydnn... check the inetpub and wwroot directories for web.config's...)

 
 
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