For several days I have attempted to install the install version of DNN 4.4.  I end up with the same error message each time.  See error message at the end of page.  I followed both the PDF instructions and the related threads in the Install It! forum.  That include the following key tasks:

1- Adding the ASPNET user to the source folder.

2 - Rename release.config to web.config

3 - Edit the web.config file to point to updated SQL Server 2000 connection string in both appSettings and connectionStrings sections.

4 - Create virtual directory with correct ASP.NET framework selected - 2.0.50727

I'm at a lost as to what to do next.  Help.

  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.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

[NullReferenceException: Object reference not set to an instance of an object.]
   System.Web.Hosting.ISAPIWorkerRequestInProc.GetServerVariable(String name) +1132
   System.Web.Hosting.ISAPIWorkerRequest.GetServerName() +15
   System.Web.HttpRequest.get_Url() +282
   DotNetNuke.HttpModules.UrlRewriteModule.OnBeginRequest(Object s, EventArgs e) +144
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +92
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64

Server Error in '/IT' Application.

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Object reference not set to an instance of an object.

Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.42

Additional info for my problem.  Sometimes after closing the browser and attempting to install app again, I get the following.  Hopes this identifies the issue with installation.

  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.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Line 76:                 Case Globals.UpgradeStatus.Install, Globals.UpgradeStatus.Upgrade
Line 77:                     If AutoUpgrade Then
Line 78:                         Response.Redirect("~/Install/Install.aspx?mode=Install")
Line 79:                     Else
Line 80:                         CreateUnderConstructionPage()

[NullReferenceException: Object reference not set to an instance of an object.]
   System.Web.Hosting.ISAPIWorkerRequestInProc.GetServerVariable(String name) +1841
   System.Web.Hosting.ISAPIWorkerRequest.ReadRequestHeaders() +121
   System.Web.Hosting.ISAPIWorkerRequest.GetKnownRequestHeader(Int32 index) +126
   System.Web.Hosting.ISAPIWorkerRequestInProc.GetKnownRequestHeader(Int32 index) +104
   System.Web.HttpRequest.FillInHeadersCollection() +30
   System.Web.HttpRequest.get_Headers() +70
   System.Web.Configuration.BrowserCapabilitiesFactoryBase.GetHttpBrowserCapabilities(HttpRequest request) +28
   System.Web.Configuration.HttpCapabilitiesEvaluator.EvaluateFinal(HttpRequest request, Boolean onlyEvaluateUserAgent) +23
   System.Web.Configuration.HttpCapabilitiesEvaluator.Evaluate(HttpRequest request) +182
   System.Web.Configuration.HttpCapabilitiesBase.GetBrowserCapabilities(HttpRequest request) +162
   System.Web.HttpRequest.get_Browser() +134
   System.Web.HttpResponse.ApplyRedirectQueryStringIfRequired(String url) +51
   System.Web.HttpResponse.Redirect(String url, Boolean endResponse) +93
   System.Web.HttpResponse.Redirect(String url) +6
   DotNetNuke.Common.Global.CheckVersion() in C:\IT\App_Code\Global.asax.vb:78
   DotNetNuke.Common.Global.Application_Start(Object Sender, EventArgs E) in C:\IT\App_Code\Global.asax.vb:252

Server Error in '/IT' Application.

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Object reference not set to an instance of an object.

Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.42

Hi LenMack - looks like there still might be a problem.  Anything between <!-- and --> will be commented out.  It looks like you have some starting comment tags before your sitesqlserver key but I don't see ending ones.  Any chance you could post your whole web.config, being sure to hide any username/password info?  I think that's the problem in your instance.

Thanks,

Erik