C# .NET - How to work with update panel ,if the page (.aspx) contails usercontrols?

Hi,
I have a web page abc.aspx (using this page like master page) in this page i wrote a Html tag < i frame ></i frame >(using this i frame as content place holder).


I'm calling home.aspx page in this < i frame > tag.


in my home.aspx page i have some  user-control. So , My question is


how can i able to implement the update panel in this scenario please tell me the solution.


Thank You,
Gorus.

After commenting the xhtmlConformance tag in web.config, update panel working normally.

<configuration>

    <system.web>
      <xhtmlConformance mode="Legacy" />
    </system.web>

</configuration>

please refer below link....
http://weblogs.asp.net/scottgu/archive/2006/12/10/gotcha-don-t-use-xhtmlconformance-mode-legacy-with-asp-net-ajax.aspx