Sys.WebForms.PageRequestManagerTimeoutException .Net error work around

Last week I had a problem when I tried to use advance smart search panel in my

code. I got this error: "Sys.WebForms.PageRequestManagerTimeoutException.

The server request timed out" from the Ajax Extension framework. Its occurred

because the smart search took a little longer time (something like 2 minutes) and

the Ajax Extension Callback framework had a timeout.

How to solve this problem?
To solve this problem we can increase the timeout. You can change the timeout

time by adding a new property to the script manager control. This property is

called AsyncPostBackTimeOut and it can help us to define the number of

seconds before the request will throw a request timeout exception*.

For example if you want that the timeout will take maximum 10 minutes your

code should be look like this:

<asp:ScriptManager ID="ScriptManager1" runat="server"

AsyncPostBackTimeOut="600" >

asp:ScriptManager>

* The default value of the AsyncPostBackTimeOut property is 90 seconds.