Network Problems On PSP.

[SRSLY]

I can't seem to access the internet on my psp anymore. I know my network has a wep key but when I scan for connections and it shows up on the list it says I have to enter a WPA key. When I enter the wep key instead it says a connection could not be established and to check my network settings. I'm completely clueless when it comes to computers and the like so I would be extremely grateful if anyone knew what was going on.

Thanks.