I already successfully installed ArcGIS for Sharepoint. When I tried to install ArcGIS Extensibility SDK for Silverlight 2.4, I got an error saying "The version of this file is not compatible with the version of Windows you're running. Check your computer's system information to see whether you need an x86(32-bit) or x64(64-bit) version of the program, and then contact the software publisher." What does this error tell me? Doesn't this extensibility SDK support 64-bit system? I couldn't find any document related to this issue. Any help is appreciated!
I'm running Windows 7 Professional and have Visual Studio 2010 and Sharepoint 2010. ArcGIS API for Silverlight 2.4 has been installed as well.