make sure that the access point and the router are on the same subnet ...192.168.1.xxx for example.
make sure the router has dhcp server enabled
make sure the access point has dhcp server disabled (if it has one)
make sure the pc has dhcp client enabled for the both the wired nic and wireless nic cards (you can use static ip's for both nic's as well if you wish - as long as they are in the 192.168.1.xxx network and are outside of the dhcp server range in the router)
so now - you should be able to get to the built in web page for the router and for the access point, from both the wired and the wireless interfaces