I have just found this old thread and would like to bring it to the top of the pile again.
My Belkin modem/router will only allocate a network address to one wireless computer at a time. If my desktop wifi is on and I try and connect with my laptop, it says it is connected and "aquiring network address" but never gets past that point unless I disable my PC wifi. Once my laptop is connected, if I re-enable my PC wifi the PC won't get past the "aquiring network address" message until I disable the laptop wireless adaptor.
The router lists both computers with their associated network addresses but can't seem to deal with both at the same time. I have tried setting the network addresses manually in the computers with no success.
I will shortly be connecting the PC to the router with a network cable which gets round the problem until my son arrives at home with his wireless laptop and we are back to square one when my wife is using the wireless laptop at the same time.
Can anyone help??