Hi there, I'm Tim and will be assisting you today. I have over 15 Years as an Engineer and have been with eBay, DoD and many others. I will do my very best to help you. If you like i can offer remote access and a call.
You may be trying to get on the wrong wireless network, check and make sure you connecting to your home router.
Because you are probably not connected to your home router, please go to wireless properties and reconnect to your at&t router