TYAN S2676 Thunder i7525, SMP and network

Hello

I have to setup a linux system on a new computer with the (i7525) S2676
motherboard and 2 Intel XEON's. I decided to setup Slackware 10.1. I
have
done it and everything was ok. But the default kernel 2.4.x have not got
the
multiprocessor (SMP) switch on. So I decided to build a new kernel with
SMP.
I have just switch on SMP (and Real Time Enhanced ... which is required
but
SMP). Now, when I run linux with the new SMP kernel I do not have access
to
the network. The controller is correctly detected (using tg3 or bcm5700
driver) but I can't setup an internet connection. I can't get an IP from
DHCP server. When I looked into dmesg I saw something like:
eth0: NIC link is down
I tried many different kernel configuration and asked many people, but
noone
could help me. I even build a 2.6.12.4 kernel but the problem is the
same.
Network runs on a non-SMP kernel very well, but don't want to run on a
SMP-kernel!!!! It is the same with tg3 or bcm5700 drivers (in case of
2.6
kernel I have problems to compile bcm5700 drivers on 2.6.12 kernel. I
get
some error messages that I can't remember now).

What is the reason? What can I do??? HELP Anybody could help me!?!

Przemek
zipi @ chello . pl