Hi,
i'm running DNN 5.2.3 under .NET 3.5 SP1 that has been upgraded from a 4.9.5 version.
All seems to works until i click on ModulesDefinition's hyprlink "yes" under in use column and i get this error.
  19/10/2010 17.12.05   Module Load Exception   host     ModuleId: 858; ModuleDefId: 208; FriendlyName< span> ...

ModuleId: 858 ModuleDefId: 208 FriendlyName: ModuleControlSource: DesktopModules/Admin/Extensions/UsageDetails.ascx AssemblyVersion: 5.2.3 PortalID: 1 PortalName: ISIS Enrico Fermi UserID: 1 UserName: host ActiveTabID: 18 ActiveTabName: Module Definitions RawURL: /tabid/18/ctl/UsageDetails/mid/858/PackageID/3/portalid/1/Default.aspx AbsoluteURL: /Default.aspx AbsoluteURLReferrer: http://www.isisfermi.it/tabid/18/portalid/1/Default.aspx UserAgent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2; WOW64; SV1; .NET CLR 2.0.50727; .NET CLR 1.1.4322; .NET4.0C; .NET4.0E; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729) DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider ExceptionGUID: a1531e96-c4cf-4093-bd37-f83e054e0b13 InnerException: Tag server 'asp:UpdatePanel' sconosciuto. FileName: FileLineNumber: 0 FileColumnNumber: 0 Method: System.Web.UI.TagPrefixTagNameToTypeMapper.System.Web.UI.ITagNameToTypeMapper.GetControlType StackTrace: Message: DotNetNuke.Services.Exceptions.ModuleLoadException: Tag server 'asp:UpdatePanel' sconosciuto. ---> System.Web.HttpParseException: Tag server 'asp:UpdatePanel' sconosciuto. ---> System.Web.HttpParseException: Tag server 'asp:UpdatePanel' sconosciuto. ---> System.Web.HttpException: Tag server 'asp:UpdatePanel' sconosciuto. in System.Web.UI.TagPrefixTagNameToTypeMapper.System.Web.UI.ITagNameToTypeMapper.GetControlType(String tagName, IDictionary attribs) in System.Web.UI.MainTagNameToTypeMapper.GetControlType2(String tagName, IDictionary attribs, Boolean fAllowHtmlTags) in System.Web.UI.MainTagNameToTypeMapper.GetControlType(String tagName, IDictionary attribs, Boolean fAllowHtmlTags) in System.Web.UI.RootBuilder.GetChildControlType(String tagName, IDictionary attribs) in System.Web.UI.ControlBuilder.CreateChildBuilder(String filter, String tagName, IDictionary attribs, TemplateParser parser, ControlBuilder parentBuilder, String id, Int32 line, VirtualPath virtualPath, Type& childType, Boolean defaultProperty) in System.Web.UI.TemplateParser.ProcessBeginTag(Match match, String inputText) in System.Web.UI.TemplateParser.ParseStringInternal(String text, Encoding fileEncoding) --- Fine dell'analisi dello stack dell'eccezione interna --- in System.Web.UI.TemplateParser.ProcessException(Exception ex) in System.Web.UI.TemplateParser.ParseStringInternal(String text, Encoding fileEncoding) in System.Web.UI.TemplateParser.ParseString(String text, VirtualPath virtualPath, Encoding fileEncoding) --- Fine dell'analisi dello stack dell'eccezione interna --- in System.Web.UI.TemplateParser.ParseString(String text, VirtualPath virtualPath, Encoding fileEncoding) in System.Web.UI.TemplateParser.ParseReader(StreamReader reader, VirtualPath virtualPath) in System.Web.UI.TemplateParser.ParseFile(String physicalPath, VirtualPath virtualPath) in System.Web.UI.TemplateParser.ParseInternal() in System.Web.UI.TemplateParser.Parse() in System.Web.UI.TemplateParser.Parse(ICollection referencedAssemblies, VirtualPath virtualPath) in System.Web.Compilation.BaseTemplateBuildProvider.get_CodeCompilerType() in System.Web.Compilation.BuildProvider.GetCompilerTypeFromBuildProvider(BuildProvider buildProvider) in System.Web.Compilation.BuildProvidersCompiler.ProcessBuildProviders() in System.Web.Compilation.BuildProvidersCompiler.PerformBuild() in System.Web.Compilation.BuildManager.CompileWebFile(VirtualPath virtualPath) in System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile) in System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile) in System.Web.Compilation.BuildManager.GetVPathBuildResult(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile) in System.Web.UI.TemplateControl.LoadControl(VirtualPath virtualPath) in System.Web.UI.TemplateControl.LoadControl(String virtualPath) in DotNetNuke.UI.ControlUtilities.LoadControl[T](TemplateControl containerControl, String ControlSrc) in DotNetNuke.UI.Modules.ModuleHost.LoadModuleControl() --- Fine dell'analisi dello stack dell'eccezione interna --- Source: Nome server: WIN10306

What am i wrong ??
Thanks in advance
Stefano

HI,
the problem was in every yes link.
What i mean with "was" it that i have solved the problem !!!
I have found that upgrading DNN site from 4.9.x to 5.2 using .NET 3.5 need to update the web.config file.
I have added this section
<controls>
        <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
        <add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
      </controls>

that was not present in my DNN 4.9 config file.
Thanks 
Stefano