cparks

I have my Ax setup with DLink DCF660w card. Works fine at home, I can email, internet, AIM, see shared drives on my Linux machine. No problem. When I go to work, it sees the access point, gets an IP address from it but can't do anything on it. Can't ping other machines on the LAN and can't get out to the internet. Tehn when I get back home I usually have to fiddle with it to get it to work home again, then it works great.
I would rather be able to use it more outside the house than in. Any ideas what to do to get this WiFi connection to work while out?