problem with authentification

[Moeller Daniel (QI/AST10) *]

Hello,

I've been lurking for some time now. I have a problem/question, but i'm not
sure if i'm posting in the correct list.
We have a samba-server with samba 2.0.6 on an Compaq SP700 PC-machine with
SuSE Linux 6.2 (Kernel 2.2.14). There area around 1500 clients, about 150
concurrent.
We also have a NT-Domain with a NT4 SP4 PDC. "security" is set to domain,
the SAMBA-Server has been integrated into the NT domain via "Server Manager
for Domains".

Sometimes NT-clients cannot connect to the SAMBA server, the error in the
logfile is as follow:

[2000/03/17 11:42:59, 2] libsmb/namequery.c:name_query(314)
  Got a positive name query response from 130.1.12.202 ( 130.1.23.3
130.1.16.160
 130.1.18.224 130.1.20.225 130.1.23.3 130.1.23.4 130.1.32.175 130.1.36.184
130.1
.54.197 130.1.3.181 )
[2000/03/17 11:43:00, 0] rpc_client/cli_pipe.c:cli_nt_session_open(1174)
  cli_nt_session_open: cli_nt_create failed on pipe \NETLOGON to machine
PDC.
  Error was ERRDOS - ERRpipebusy (All instances of the requested pipe are
busy.)
[2000/03/17 11:43:00, 0] smbd/password.c:domain_client_validate(1404)
  domain_client_validate: unable to open the domain client session to
machine *.
 Error was : ERRDOS - ERRpipebusy (All instances of the requested pipe are
busy.
).

I've browsed through the mailinglist archives and found some messages around
mid 1999 with a similar error, but this doesn't help me.
Can you help me?

Regards,
Danny