I added the new ASP.Net AJAX 1.0 library that Microsoft just released to my website that is based on the Mere Mortals Framework. I also added all of the necessary keys to my web.config. Some of the AJAX controls work fine on my web pages, but when I try to add any of the Extender controls to a form based on mmBaseWebPage, I get the following error:

Message: Extender controls may not be registered before PreRender. 
Call Stack:    at System.Web.UI.ScriptControlManager.RegisterExtenderControl[TExtenderControl](TExtenderControl extenderControl, Control targetControl) 
   at System.Web.UI.ScriptManager.RegisterExtenderControl[TExtenderControl](TExtenderControl extenderControl, Control targetControl) 
   at System.Web.UI.ExtenderControl.RegisterWithScriptManager() 
   at System.Web.UI.ExtenderControl.OnPreRender(EventArgs e) 
   at AjaxControlToolkit.ExtenderControlBase.OnPreRender(EventArgs e) in d:\E\AjaxControlToolkit\Release\AjaxControlToolkit\ExtenderBase\ExtenderControlBase.cs:line 370 
   at System.Web.UI.Control.PreRenderRecursiveInternal() 
   at System.Web.UI.Control.PreRenderRecursiveInternal() 
   at System.Web.UI.Control.PreRenderRecursiveInternal() 
   at System.Web.UI.Control.PreRenderRecursiveInternal() 
   at System.Web.UI.Control.PreRenderRecursiveInternal() 
   at System.Web.UI.Control.PreRenderRecursiveInternal() 
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) 

It looks like the problem may be due to the fact that mmBaseWebPage.OnPreRender() doesn't always call base.OnPreRender (e). Does anyone know if this was changed in MM 2.2 or 2.3?

protected override void OnPreRender(EventArgs e)
		{
			if (this.FocusedControl != null && this.FocusedControlID != "") 
			{
				this.RegisterStartupScript("FocusedControl","<script language='javascript'>\r\ndocument.getElementById('" + this.FocusedControlID + "').focus();\r\n</script>\r\n");
				base.OnPreRender (e);
			}

//			if (mmAppBase.Localize) 
//			{			
//				// *** Causes the form to localize
//				this.OnLocalize(this.CurrentLanguage);
//			}
		}