TimeOut Issue while deleting multiple Virtual Machine at single request..

Hi,

I m  in deep trouble.. I m getting the following error..

Message: Sys.WebForms.PageRequestManagerTimeoutException: The server request timed out.
Line: 940
Char: 13
Code: 0
URI: http://127.0.0.1:81/ScriptResource.axd?d=on1t6Pk2_uvvrXX5hXL_DY6uF_d5WuwRT-YAGkPEKpR3ITeErTeDDi2mMUlLVOWZHe6oqwQnug1K5MBzE_sa1X_r7qdb9yAqWGL77JhLXUn5eLFs8DiltqhLSrZcIfm4SOSEmS0qQKqX43UcAO3PeA2&t=4efab3ce

To resolve this I do following ..

 <appSettings>

 <add key="aspnet:MaxHttpCollectionKeys" value="100000" />
  </appSettings>

and also...

<system.web.extensions>
<scripting>
<scriptResourceHandler enableCompression="false" enableCaching="true"/>
</scripting>
</system.web.extensions>

But Still I am getting the same issue.

Please help me.