cannot connect or make connection

im on a diff comp with vista with the same modem and im tryin to hook up my computer on the same modem with xp. all im doing is unpluggin the ethernet plug and pluggin it into mine. and i cant get no connection. I go into network connection and it cant make any new connection.. any ideas??

 

do you know if your nic is working? go to device manager and check that all your devicing are listed and working

 

Unless your modem has router capabilities, (which it probably doesn't), reboot the modem and comp when you switch the cable - power up the modem first, let it get connected to the ISP and then the comp. When you switch back, do the same.