I have a wireless router and I just bought an AP to increase the wireless range of the router which is set in "Repeater" mode. The ubuntu box can see both almost equally (80-90% on each). When the repeating AP is on I cant connect to the router, even if I use network admin to specify the MAC address as the router.

There is no security etc setup on the router network, a winxp box can talk through the repeater easily.

Thanks for any help