Need help with my Acer Aspire one

Hello,
im a student at the miami valley career technology center. we each get laptops to use for school, our happens to be the Acer Aspire one. My house used to run off Lynksys, a wireless internet out of sprint i think? anyway it connects to that, but it wont connect to the new internet my dad got. 2WIRE701. it says the signal is excellent, but it never gets past the "acquiring the network address" stage when it is trying to connect. I have tried everything i can think of. Anyone know why this is doing this? I could reallly use some help on this.