Network browsing

Hi.
I have some kind of problem with network browsing.
We have three subnets:
1 - 192.168.1.0,
2 - 192.168.2.0,
3 - 192.168.3.0.
Users of subnet 2 & 3 are able to browse network using explorer, but users
of 1st aren't. When you're trying to do it you can only see your maching into
browser screen.
Subnets are connected by RRAS.
And every machine can be reached using command line from any subnet.

What problem could it be?
May be someone has already have this type of error.

Thank you.

Is this a domain? Are all domain clients pointing at the same WINS server?

--
Todd J Heron, MCSE
Windows Server 2003/2000/NT
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