I am developing an application based on .Net Framework 3.5 sp1 and hosted on windows server 2008(64bit).
While browsing wcf service (.svc) locally every things is ok
If you're using .Net 4.x, the PublicKeyToken is 31bf3856ad364e35.
However, following this post about installing WCF Services properly in IIS, the handler was set up for me.