VS2010，这次把AjaxControlToolkit升级到了.NET4.0下的DLL,以前是用的3.5的DLL，其它的一切都正常，就是ReportView报表查看器无法用了。还有就是本来VS2010中的ScriptManager和UpdatePanel如果我不在ASPX页面中注册AjaxControlToolkit.NET4.0的控件，就会报错Element is not a known element. This can occur if there is a compilation error
in the Web site, or the web.config files is missing.
报表报错提示如下：
Report Viewer Configuration Error
The Report Viewer Web Control HTTP Handler has not been registered in the application's web.config file. Add <add verb="*" path="Reserved.ReportViewerWebControl.axd" type = "Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=10.0.0.0,
Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" /> to the system.web/httpHandlers section of the web.config file, or add <add name="ReportViewerWebControlHandler" preCondition="integratedMode" verb="*" path="Reserved.ReportViewerWebControl.axd" type="Microsoft.Reporting.WebForms.HttpHandler,
Microsoft.ReportViewer.WebForms, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" /> to the system.webServer/handlers section for Internet Information Services 7 or later.
请问该如何解决！
