can't map to a network drive but can map to others

I am using Vista OS. The servers are using Windows 2000 Server. I am able
to map to all servers except one.. I can ping the server which I can’t map,
but that’s all I can do. The error message says, I don’t have permission to
it. I am logging on as a Domain Admin. I’ve checked the server to make sure
my PC can access it.



Any help would be appreciated.