I have an airport express at my house. We just got our kids a computer for their room. it is on the other sid eof the house from where I have the express set up at. We're looking about 60-70 feet away. I got a bridge from work to try to and get it up and running, but it just won't pick up the signal. I tested my iphone in their room, and the wireless signal drops on it too. I'm not sure what to do about it at this point. Advice?