Network logon

Recently migrated DCs from NT to 2003 server (don't think
this is related to my issue, but...) Only have 3 Windows
ME machines and all were logging onto the domain fine.(all
other workstations run 2000, xp & 9x) Received a call
from user of a ME PC, can't logon to domain. Found that
the Windows Logon (no domain field)dialog is displayed
even though Client for Microsoft Networks is installed and
selected as the Primary Network Logon.
Uninstalled/reinstalled client and tcp/ip several times
but still can't get the Client for Microsoft Networks
dialog. To test I installed Client for Netware and I get
the proper logon dialog. Haven't found a solution in
knowledgebase, haven't figured it out. Any help or
suggestions would greatly appreciated. Thanks, Bill