samba - Apr 2003 - win2000-terminal-server: access-problem to samba server

we have several samba-servers that work fine.
no access-problems, even not from windows NT terminal server.

but on our windows2000-terminalserver only ONE user at a time can connect
to a linux-samba-server.
for the FIRST user connecting to samba, everything is o.k.,
for the the NEXT user,the samba-server is displayed in the
windows-browser-list (or via 'net view'), but as soon as it is clicked,
an
error message comes up, saying that user or password is wrong.
entering 'net view \\fs3' in a dos-box the message is 'system error
5 -
access denied'

as soon as i kill the existing connection  (via SWAT - Active Connections -
Kill), the next user can connect!
(still, only this one can access samba!)

to make things more complicated:
there's no problem with older samba-versions (2.0.5, 2.2.0), but with the
younger ones (2.2.1, 2.2.3a).

i logged the failing connection-attempt between terminalserver-client and
samba-server with tcpdump (smb-version). in the reply of the server it
says:
SMBError = ERROR: Unknown error (109,49152).

perhaps someome can halp.
attached please find the log.

(See attached file: smbdump.002)

regards - Philipp Metzger
Terex Germany GmbH & Co. KG