Vista Business Logon Unsuccessful on 2000 Domain Shared Folders

> Hello all,
>
> I am trying to access shared drives on 2 Servers in my 2000 Domain. I can
> access all of the drives on my domain controller fine, but when I try to
> reach any of the folders on my other two 2000 servers it says Logon
> Unsuccessful for ANY username/password combo I have.
>
> I imagine this is something easy I've missed somewhere but I've read every
> article out there and I don't understand how I can have full access on on
> the
> Domain Controller yet be unable to reach anything on the other two
> servers.
>
> I just bought this Vista Business Machine for testing purposes and my
> normal
> machine is a XP Pro machine which has no problems accessing either server
> with the exact same user name/pass.