ok i need help on setting up a wireless network

ok the set up i have is

cable modem > wired router > wireless access point > desktop pc with a pci
wireless card and a notbook with internal wireless

so i then try to connect the pc to the access point to get to the config
page, i change my wireless addapters settings (to connet to the ip of the
access point) and then try to connect using the ip in the manual but thats
as far as i get i dose not find it, nor can i do the same on the laptop

anyone got any ideas?

p.s. i am trying to set up the AP while hard wired to it