[superfatneck]

Hi all, right i am currently using a ntl 250 modem connected to a D-link wireless router, my internet all worked fine wired on my laptop and ps3 before but recently swapped ps3 for xbox and now i cant use the ethernet cable on both the xbox and laptop, the enat light on the modem dont come on if i run the ethernet wire straight to the xbox or laptop but plug it in the back of the router it lights up? but both work fine wireless! very stumped as to why? tried everything possible but no luck, any ideas would be great please!!