deleting airport network


I am using Panther (10.3.2) on a PowerBook G4. I have had my laptop for about a year and in that time I setup a airport network connection with my NETGEAR router (which is connected to my Windows PC).

I have never had a problem prior to this, but now I cannot connect to the Internet on my laptop. It seems there is this network (called "anash" which I have no idea how that got there). How do I delete this network? Is it possible this is a neighbors network or something? No one else uses my laptop, so I have no idea how it got there).

My network seems to intermittenly appear, and when I connect to it, my signal strength is extremely low (even though I am 2 feet from the router).

Any idea how I can rectify this?

Any feedback would be appreciated.