can you ping remote computer by ip? If yes, can you ping it by name? this step b ystep troubleshooting may help, http://www.howtonetworking.com/Troubleshooting/notaccessibale0.htm

Don't send e-mail or reply to me except you need consulting services. Posting on MS newsgroup will benefit all readers and you may get more help.

Bob Lin, MS-MVP, MCSE & CNE
How to Setup Windows, Network, Remote Access on http://www.HowToNetworking.com
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
This posting is provided "AS IS" with no warranties.
I recommend Brinkster for web hosting!

 We installed a new pc yesterday and we cannot see our network from it. Now we
 can see this pc from other pc's on the network. Our Computer services
 department says that we have no domain and just plugging the pc into the
 network is all that needs to happen in order to see other machines and
 servers....is there anything on this XP machine that we need to setup or
 enable that our Computer department isn't knowledgeable about?