I have a netgear wireless. i have a netgear wireless modem/router. i have my laptop online using

Question

i have a netgear wireless modem/router. i have my laptop online using connected from the modem by a wire. i also have my xbox connected to the same modem also with a wire. the xbox will not sign on to xbox live as it says two items cannot us the same ip address, so how do i get my xbox to sign on to xbox live without also having to disconnect my laptop. thanks