ASP。在IIS7上的NET Web API -没有找到404

I have a simple web api project. When I deploy it on IIS 7.5 on Win 7 using Publish feature under VS2010, it works fine. But when I deploy it to IIS 7 on Windows server 2008 (msinfo32 shows version is 6.0.6002 service pack 2), it returns 404.0 Not Found for the same GET request that worked on IIS 7.5I have a simple web api project. When I deploy