is very strange, the Windows 7 client can connect, but not xp clients, find the hasn't played patch server, xp client is ok, as if has something to do with patches, but don't know which patch, online solution
Used to connect to the database 2008 times fault: a connection with the server has been successfully established, but an error occurred during login before shaking hands, (the provider: a named pipe provider, error: 0 - remote host forced to shut down the existing one connection