NT Server not loading networked drives

For some reason my NT 4.0 SP6a server has stopped giving out network drives from login.(ie. when you login “H” maps to \\server\users\username).

Nothing has changed recently other than a new second BDC coming online as a full-time print server.
I made sure that my PDC has replication, RPC and netlogon services running. I am at a loss. Any help would be great…