networking not possible (with DHCP or manual set up)

[Tino Meinen]

I hope someone can give me a hint on this.

After a FCtest3 installation on my workstation I found that I didn't
have a network connection. 
I have a 3Com card (3c900B requiring the 3c59x module)
I tried to set my network up with redhat-config-network, to no avail.

I found out that resolv.conf is empty.
See bug https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=107241

Copying resolv.conf from my working RedHat 9 installation didn't work.
Manually entering my IP adres and Mask in redhat-config-network made it
possible to activate my ethernet-card (/sbin/ifconfig showed the correct
parameters for eth0) But I was still unable to ping my nameservers:
Network unreachable.

I have never had network trouble with any previous Red Hat installation,
or any other linux distribution. It always worked automatically. So I'm
not really experienced in debugging this.

Does anybody have an idea what I could try to pinpoint the problem?

Thanks in advance.
Tino Meinen