Network Connection Trouble

I am trying to connect Vista Ultimate to our network at the office.
I have tried both wireless and a local (wired).
The wireless connection works fine at home.
I have network discovery turned on and the network and sharing center shows
that I have a connection to the internet. I can open msn.com, but when I
select a link on the page it won't open the link. If I look a a full netwok
map it shows all the computers on the network plus the connection to the
internet.
I have tried diableing the firewall on the lap top also.

Does anyone have an idea why I am not connection properly?