I'm having serious problems all of a sudden (out of nowhere). I can access my router fine, and I can direct hookup my comp to the modem. But when I try to route through my router, and ping my modem, it starts dropping packets. Shouldnt be the cable (tried 2, also since no loss direct to modem), should I suspect the modem or the router? The modem is motorolla SB4100 (an older model by the looks). Thanks!