Single xp computer can't connect to a single server

I have a w2k3 based network with 8 servers and 90 windows clients. I
have a single xp pro computer (sales1) that is unable to connect to a
single server (trm02) in my network. Using both the IP address of the
server and the dns name, I get no response when on this computer. A
ping to the server ip gets no response. I can connect to any other
server with this pc, and I can connect to the server in question using
any other pc on the network. I disabled the firewall on the pc with
no luck, checked ip filtering settings (no filtering on). I would
guess something is filtering or blocking connection to this server but
I'm unable to find it.

Any help is appreciated.
Steven