Connecting Sony PSP to internet

Hi - checked everywhere else for detailed help with trying to connect my son's Playstation Portable to the internet but still no success. HAd great luck here before cleaning malware from my PC, so I figured I'd give it a shot. First, my setup: RoadRunner cable to Ambit modem/router, which is connected to an old Gateway PC/ modem by ethernet cable in the basement, then the main PC upstairs is a Dell connected wirelessly via the basement router. The Dell connects excellently to Roadrunner/IE, but after plugging in the IP addresses on the PSP Network Setup, the connection always fails. I'm guessing I need to change a MAC filter on the router, but for some reason I can't connect to the router's website interface via 192.168.0.1 to change any configurations. I'm wondering if Roadrunner has this blocked, but it seems like there's got to be some way to connect the PSP without having to call RoadRunner - which I'm really trying to avoid doing. Any detailed help would be appreciated. Thanks!

i was able to use the wireless feature of the psp to connect to a lynksys with no problem. i just had enter the WEP key into the PSP.

And which WEP key is that?! Not quite sure where to get it from. Thanks.