WinXP can't mount share from Samba 2.2.2 on RH linux

[Craig Barratt]

I am unable to mount a share using WinXP from samba 2.2.2 on RH linux.
The same share works correctly with Win95 clients.

WinXP reports this error:

    The mapped network drive could not be created because of
    the following error:
    The account is not authorized to login from this station.

I looked through various archives and applied the registry patch
for requiresignorseal=0 in this message:

    http://www.mail-archive.com/devinfo@lists.e-smith.org/msg05739.html

Here's the samba log file (at debug level 3) from client.log:

[2001/11/06 17:32:55, 3] smbd/process.c:process_smb(860)
  Transaction 1 of length 137
[2001/11/06 17:32:55, 3] smbd/process.c:switch_message(667)
  switch message SMBnegprot (pid 2506)
[2001/11/06 17:32:55, 3] smbd/sec_ctx.c:set_sec_ctx(321)
  setting sec ctx (0, 0) - sec_ctx_stack_ndx = 0
[2001/11/06 17:32:55, 3] smbd/negprot.c:reply_negprot(349)
  Requested protocol [PC NETWORK PROGRAM 1.0]
[2001/11/06 17:32:55, 3] smbd/negprot.c:reply_negprot(349)
  Requested protocol [LANMAN1.0]
[2001/11/06 17:32:55, 3] smbd/negprot.c:reply_negprot(349)
  Requested protocol [Windows for Workgroups 3.1a]
[2001/11/06 17:32:55, 3] smbd/negprot.c:reply_negprot(349)
  Requested protocol [LM1.2X002]
[2001/11/06 17:32:55, 3] smbd/negprot.c:reply_negprot(349)
  Requested protocol [LANMAN2.1]
[2001/11/06 17:32:55, 3] smbd/negprot.c:reply_negprot(349)
  Requested protocol [NT LM 0.12]
[2001/11/06 17:32:55, 3] smbd/negprot.c:reply_negprot(433)
  Selected protocol NT LM 0.12
[2001/11/06 17:32:56, 3] smbd/process.c:timeout_processing(1085)
  end of file from client
[2001/11/06 17:32:56, 3] smbd/sec_ctx.c:set_sec_ctx(321)
  setting sec ctx (0, 0) - sec_ctx_stack_ndx = 0
[2001/11/06 17:32:56, 2] smbd/server.c:exit_server(458)
  Closing connections
[2001/11/06 17:32:56, 3] smbd/connection.c:yield_connection(50)
  Yielding connection to
[2001/11/06 17:32:56, 3] smbd/server.c:exit_server(493)
  Server exit (normal exit)

So XP appears to be closing the connection even before it has sent
the share name, user name or password (there is no "Transaction 2"
in the log file since the connection is closed).  The same user error
is printed by XP even if I use a bogus share name, confirming that it
doesn't even try to send the share name.

I guess I've misconfigured something on WinXP, or I botched the upgrade
to samba 2.2.2.  The domains look correct.  The WinXP machine can mount
a share from a Win95 machine, and as I mentioned above the Win95 machine
can mount the share from samba/linux.

Suggestions are welcome!

Craig