Just bought two Zeepad 7.0 today. One connected to our wifi with no problem, the other one won't. When we go into the settings and slide the wifi from off to on, it stays there for about 10 seconds and then slides itself to off. I have already tried to do a reset to factory settings and that didn't help either. I have looked at other settings and can't see any reason why it is doing this. Suggestions....?