More likely it's Windows or other software firewall(s). Turn them off -- once a reliable connection is made, re-enable and they should adapt to the new connections.
i tried doing that a couple of times but still get nothing, i dont understand why my xp in the office where my router and cable modem are cant see the wireless connection my vista is on? i have tried everything but nothing works, it should be simple but i'm over looking something what i dont have a clue. thanks you for your advice. if you think of anything else it could be please let me know and thanks again.