The custom tool 'MSDiscoCodeGenerator' failed

Question

I am developing device application and web service in visual studio 2008.

when i add web reference to project, it adds successfully. but When i am trying to update web reference it gives me error

 The custom tool 'MSDiscoCodeGenerator' failed

 

i tried some solutions, but didnt work
is there any way to solve this error ??

What I have tried:

1.Installed Power Toys for .NET Compact Framework 3.5
2.Reinstalled Compact Framework 3.5 (uninstall, reboot, install)
3.Installed SQL Server Compact 3.5
4.Reinstall vs 2008
5.From the command line execute the following command:
devenv /resetskippkgs