Problem If you have implemented ASP.NET 4.0 URL Routing in your application when you deploy on the server it may not work.
Solution Keep following config after </system.web> (make sure that it is not inside system.web).
<system.webServer>
<modules runAllManagedModulesForAllRequests="true" />
</system.webServer>
And ASP.NET 4.0 URL Routing starts working !
Hope this helps, Thanks
Regards,
Sheo Narayan
http://www.dotnetfunda.com