169.254.x.x is what Windows automatically assigns when it can't get an IP address any other way. Try to reassociate with the AP (reboot the laptop if necessary, or just reinsert the wireless NIC if it's external). Only thing I would do from here is look around the web interface on the AP, specifically the DHCP settings. Wish I knew what exactly to tell you to do/look for, but hopefully there will be a clue in there somewhere.