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

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

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

Source Error:

Line 145: protected override void OnPreRender( EventArgs e )

Line 146: {

Line 147: base.OnPreRender( e );

Line 148:

Line 149: // add js for client-side error settings...

Source File: c:\Cis_internal_apps\YetAnotherForum\YetAnotherForum.NET\App_Code\YAF\Modules\PagePopupModule.cs Line: 147

Anyone know how to fix this?

Charvakas