I have this very same problem. YAF runs fine on my local dev machine, but I get the error "Method not found: 'System.Web.UI.CompositeScriptReference System.Web.UI.ScriptManager.get_CompositeScript()'" on my IIS6 production server. I have other .Net 3.5 websites that are running correctly on this server and I know that beyond installing .Net 3.5 on the server, there is no configuring to do in order for IIS to make use of it. Further detail of the error:


Exception Details: System.MissingMethodException: Method not found: 'System.Web.UI.CompositeScriptReference System.Web.UI.ScriptManager.get_CompositeScript()'.

Source Error:
Line 229: {
Line 230: // init the popup first...
Line 231: base.OnInit(e);
Line 232:
Line 233: // make a few changes for this type of modal...

Source File: c:\HostingSpaces\expectra\testing.expectra.com.au\wwwroot\App_Code\YAF\Modules\PagePopupModule.cs Line: 231

Does anyone have any suggestions?