I have a linksys BEFSX41 router, and im tryin to set up a small network to the internet, but every time i plug in the network cable from my motorola SB4100 cable modem into the wan socket on the router, the indicator lights dont come on. ive tested the wan socket by looping a network cable from the wan socket to one of the other sockets, and the indicator lights come on then. can any one help me???