I've tried to upgrade from 4.9 to 6.2 and get the following error.   
I found some posts regarding the error and it appears to be associated with the Chat module, but none seemed to provide a suggested solution.   The site is completely down.

Compilation Error

Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately. 

Compiler Error Message: BC30002: Type 'Web.HttpContext' is not defined.

Source Error:


Line 307:
Line 308:            Try
Line 309:                Dim ctx As Web.HttpContext = Web.HttpContext.Current
Line 310:                Dim lvstrImageRoot As String = String.Empty
Line 311:                oCache = ctx.Cache.Get(key)

Source File: E:xxxxxxx\www\App_Code\Chat\DnnChatCodeHelper.vb    Line: 309

Thanks for the suggestion.  

I deleted the Chat folders and reference in web.config to Chat.   

That got rid of the original error, but now I'm getting the following error...

Compiler Error Message: CS0234: The type or namespace name 'Linq' does not exist in the namespace 'System' (are you missing an assembly reference?)

Source Error:


Line 26: using System.Globalization;
Line 27: using System.IO;
Line 28: using System.Linq;
Line 29: using System.Net;
Line 30: using System.Net.Mail;

Source File: e:xxxx\www\Install\UpgradeWizard.aspx.cs    Line: 28

Any suggestions on this one?!!!

Thanks,

Jill

Host tells me that ASP.NET 3.5 with SP1 is installed.   

Any other ideas?!!

Jill