My Tivo is making me angry!

I have 2 Tivos, no home phone line, and only one wireless adapter. Until today, I have always solved this problem by just switching the adapter between Tivos every few days. (I know, such a pain, but not as much of a pain as trying to find a new one.) Well, today my main Tivo won't recognize/see the network. I have turned everything on and off, reentered all the passwords, etc. and followed all the troubleshooting steps. I would be worried the adapter wasn't working except that it can sense the network - it just can't connect to it. It keeps saying "no signal!" So frustrated!

(ok, I know this is a diamond shoes sort of thing, but it's making me mad)

eta: So, I moved the adapter about 15 inches so it was right next to the Airport and now it's working fine.