Can not connect to wireless network!

I have a strange problem with my network. I have three PC's, two wired and the other a wireless connection. I also have Xbox 360, Wii and PS3. The wireless connection works with all the above wireless adapters using a Belkin N1 router. I use WAP security. I have been trying to add a wireless adapter to one of my wired PC's, when I search for available networks within Network Magic, I can see my network but it shows as having WEP security, I've tried entering my WAP password, but it asks for my WEP password instead. When I try to login to the router from my browser (from wired PC) it will not let me login and view/change settings. However, from the other wired PC I can login to the router and it is still set to WAP, I have also power cycled the unit. From my wireless PC I also look for available networks and can see mine, which shows it as having WAP security. I'm completely baffled as to what has happened. How can one Pc show one thing and the other another when they are looking at the same router. I've tried connecting via Windows wireless connection and I get the same problem...

Please help, it's driving me mad!!!!!

make sure that you have completely eliminated any WEP keys or WEP settings on the Router. I would say that the router makes you either choose one or the other, but I havent seen them all, but I have seen some funky things that the software developers have missed. I am assuming that you are talking about WPA, and not WAP. Does the the wireless card you are trying to use support WPA? If so, im really not sure, without seeing it for myself. Maybe try resetting the router and starting from scratch. I don't like doing that, but sometimes thats just waht has to be done. Hope this helps.