I have been updating my website and have brought the site up to DNN 5.06.00 (459).  I ran into a install error involving the wrong version of the Telerick dll.  I ended up copying the that file from the full install on my site to resolve the issue.  I then upgraded forums to 5.0.0. There were no errors listed in the install I did over the previous one.  I saw no instructions on doing a upgrade so just installed over the current version. 

I can load the page with the forums but when I clickk on any of the individual forum topic areas I get this message at the top of the form.


A critical error has occurred. 
Could not load file or assembly 'Telerik.Web.UI, Version=2010.1.309.35, Culture=neutral, PublicKeyToken=121fae78165ba3d4' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

The event viewer shows the following. 

AssemblyVersion: 5.6.0
PortalID: 0
PortalName: XXXXX
UserID: 1
UserName: host
ActiveTabID: 69
ActiveTabName: Forum
RawURL: /Forum/tabid/69/forumid/1/scope/threads/Default.aspx
AbsoluteURL: /Default.aspx
AbsoluteURLReferrer: http://www.freefirezone.com/Forum/tabid/69/Default.aspx
UserAgent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.2; WWTClient2; OfficeLiveConnector.1.5; OfficeLivePatch.1.3; .NET4.0C; .NET4.0E)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: a16893b9-803f-43c0-addb-81589f1086fd
InnerException: Could not load file or assembly 'Telerik.Web.UI, Version=2010.1.309.35, Culture=neutral, PublicKeyToken=121fae78165ba3d4' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: DotNetNuke.Modules.Forum.Threads.CreateChildControls
StackTrace:
Message: DotNetNuke.Services.Exceptions.PageLoadException: Could not load file or assembly 'Telerik.Web.UI, Version=2010.1.309.35, Culture=neutral, PublicKeyToken=121fae78165ba3d4' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) ---> System.IO.FileLoadException: Could not load file or assembly 'Telerik.Web.UI, Version=2010.1.309.35, Culture=neutral, PublicKeyToken=121fae78165ba3d4' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) File name: 'Telerik.Web.UI, Version=2010.1.309.35, Culture=neutral, PublicKeyToken=121fae78165ba3d4' at DotNetNuke.Modules.Forum.Threads.CreateChildControls() at DotNetNuke.Modules.Forum.ForumBaseControl.CreateChildControls() at DotNetNuke.Modules.Forum.DNNForum.CreateChildControls() at System.Web.UI.Control.EnsureChildControls() at DotNetNuke.Modules.Forum.ForumBaseControl.EnsureChildControls() at DotNetNuke.Modules.Forum.DNNForum.Initialize() at DotNetNuke.Modules.Forum.ForumBaseControl.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) WRN: Assembly binding logging is turned OFF. To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1. Note: There is some performance penalty associated with assembly bind failure logging. To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog]. --- End of inner exception stack trace ---
Source:
Server Name: WEB707

I'm sure the forum is trying to reference the previous vesion of Telerik.  Where do I find this reference and how can I correct it.

Thanks Mike 

I get the same error with a fresh install of 5.06.00.  I noted it uses Forum 5.0.0 so I upgraded to 5.0.1 but still the same error.  I didn't copy any files yet and my  runtime is:

<runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <probing privatePath="bin;bin\HttpModules;bin\Providers;bin\Modules;bin\Support;" />
      <dependentAssembly>
        <assemblyIdentity name="Telerik.Web.UI" publicKeyToken="121fae78165ba3d4" />
        <!--Upgraded by DotNetNuke.Telerik.Web version 5.6.0 - Date: 1/14/2011 3:30:55 PM-->
        <!--<bindingRedirect oldVersion="2008.0.0.0-2020.0.0.0" newVersion="2010.02.0929.35" xmlns="urn:schemas-microsoft-com:asm.v1" />-->
        <bindingRedirect oldVersion="2008.0.0.0-2020.0.0.0" newVersion="2010.02.0929.35" />
      </dependentAssembly>
    </assemblyBinding>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1" appliesTo="v2.0.50727">
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Extensions" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Extensions.Design" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>

Any ideas??