I have just bought a D Link DIR 635 wireless router to share my cable broadband. It is working perfectly with my IMac and an XP laptop (both on the floor below the router). My daughter's I-phone works with it too, however her MacBook that's in the same room as the router is having problems with it. It connects wirelessly and has an IP address assigned to it, but will not connect to the internet or allow access to the router (via 192.168.0.1). If I connect to the router using a cable it works fine. The MacBook worked fine with the previous router. The settings in Network preferences are exactly the same in both macs (other than the IP address). Both have Leopard with all updates loaded. I have tried re-setting the router, resetting the cable modem, resetting both, I even tried adding the MacBook in a DMZ but to no avail - any ideas?