NT workstation that won’t log on

I have a NT 4.0 workstation that was able to log into the domain last week and access files on the PDC. Made network changes. Made a different server a PDC and reloaded the old PDC to be a member server. Now my workstation can logon and access files on the PDC and BDC but not the member server. I get a message that I am not a user or my password is invalid only when I try to access files on the member server.