[Samba] Performance problems with new server

[The Schlehuber's]

I am having a heck of a time creating a new samba  PDC server. I have
installed Samba 2.2.6 on a SuSE 8.0 system.  I have defined the machines and
users via smbpasswd, created the roaming directories and share points  and
the server starts with no problems.

All of the machines are XP with SignOrSeal set.

What I am experiencing is the users are interegated for their
userid/password as expected. I enter it and then I get "loading user
settings" on the XP machines. This will sit for 10-30 minutes. Their
profiles are empty on the server so the amount of data is small being sent
across the wire. I see almost no network traffic during this period of time
across the network. I have set log level = 10 and I see nothing unusual. It
is running at 100Mbs half duplex to a switch/router with 2 XP machines.

The same thing occurrs when it is a Samba 2.2.3 and a 2.2.5 system

I have recreated this environment on another network and it works great. I
imagine the problem must be with the samba machine somehow. It appears to
FTP and sendmail with no bottlenecks. It is a brand new machine Athlon XP
2000+, 512M DDR and Raid controller. It does use an integrated Realtek
TRL8100BL ethernet controller which I have seen some newgroups complain
about.

Any thoughts what I should look for to debug this system. I am pulling my
hair out on this one.

Thanks in advance for any assistance.
Pat