Could not download the silverlight application or the silverlight plugin could not load

Question

I am using silverlight telerik control in my silverlight application , bacuase of this size of xap is increase to 1.6 mb.
I am using this xap in sharepoint 2010 and deploy it  as a web part. but its giving me an error...
Could not download the silverlight application or the silverlight plugin could not load.
To reconfigure the web part or to provide a different silverlight application(.xap), open the tool pane and click configure.
But same xap is working perfectly in .net web application but its giving an error in sharepoint site.
I search for solution on this error and i get know that silverlight webpart has timeout of 5 sec. So anyone can help me to increase the timeout for loading the complete xap into my sharepoint site.