You get the following error when running your deployed application:
Could not load file or assembly 'System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies.
This error usually occurs because the .Net framework 3.5 is not installed on your server.
Search for "download .NET Framework 3.5 SP1" on the Internet and download and install the framework from the Microsoft web site.
Part VII: Troubleshooting Applications
Application Runs But No Data is Displayed