The setup start and works well until "Finishing installation", then I'm getting an "An error occurred while installin main application assembly" error, then clicking OK the installation finish, but when I try to create e model from an existing database, I can connect to DB, retrieve tables, but when it try to create the .edmx file, Visual Studio 2008 SP1 hang up and I need to end the process...

Any idea ? My dev machine is a Windows Vista Business x64 SP1
Thanks
and regards
Luca