WiFi problem

HiI got mine A-Pad about a week ago. I'm having a problemwith the WiFi, it doesn't work after starting device. It's notthe Router, I tried to connect at several locations with no luck.If, I do a Factory Reset the A-Pad find the network, and I'mconnected to the Internet, If I turn off A-Pad & restart it, it will connect. When I turn off device over night, and start it the following dayit can't find the network must do other Factory Reset. Another wayI can connect if I go to Router setting, and change from G to B,Gand save. Then A-Pad find network? Is anyone have is problem orsomething similar?I'm leaning toward a Software problem, because once connected itdoesn't drop off. I hope a firmware might fix problem?I don't know if I should return it.Regards