My NT40 server can’t comm. to Win2k

I have a NT40 PDC SP6a and want to map a drive to a shared folder on a win2k SP3 machine. the error i get is “The user must change his password before he logs on the first time” on the NT40 server. I click OK and the error box goes away…that’s it. On any other machine in my network I can see and map to the shared folder on the Win2k machine.

The win2k permissions for the shared folder allow the NT machine (all users) full access. The NT40 can ping the win2k machine. In the win2k machine I have allow all machines “Access this machine from the network” rights in the Local security policy setting. How can I get a mapped drive from my NT40 server to a shared folder on a win2k machine?