I want to use the accordion from the ajaxtoolkit. But when I run my webpage, I get the following error:

Control 'ctl00_ContentPlaceHolder1_Accordion1_AccordionExtender' of type 'AccordionExtender' must be placed inside a form tag with runat=server.

What's the problem here?

if u r using master pages and u want to put accordion control in the content page dont forget to put script manager in the master page

n chek in ur master page in the form tag runat=server attribute is specified.....

OR

if u r using normal page then check u must specify runt=server in the form tag like

 <form id="form1" runat="server">

hope this helps