My Wii doesn't seem to be able to locate my router.

I tried searching for an access point and I was told none could be found, so I tried manual setup and, after typing in all the required information, I got the error "51030 Unable to find an access point".

I have a Netgear DG834G router and have successfully connected a laptop and a DS to it wirelessly before.

Anybody know what I need to do to fix this?