Connect OS-X to Windows 2003

I have a client who is using a Mac OS-X
(10.3.?) in a Windows environment. Since they
upgraded from Server 2002 to 2003, he can’t
get on the server with his Mac.

He logs in and can see volumes and folders,
but no files. He can’t copy files from his local
Mac to the server. Since he sees the volumes
and folders, I assume the protocol is correct.

Using his log in credentials on a Windows
machine – all is good – he sees everything and
copy files to/from local machine just fine. So
the permissions are right.

Don’t know what’s going on here. Don’t know
what changed in server 2003? Maybe the folks
who upgraded the server changed
something?

– Tony D