i have two mac computers. imac and macbook pro connected to a time capsule. but i get an error saying another device on the network is using your computer's IP address. i have tried restoring the tc to its factory settings and then configuring the network again and at the end of the process it tells me the same thing.. i have an att internet provider with speedstream modem. it was working fine two days ago but now i just cant get it to work.. i would appreciated if anybody would help me.thank you