I had to install a new Gigabit Ethernet PCI Adapter. It was pretty simple, but after I completed all the steps it wouldn't work. I brought my computer to someone and they said it worked fine. They connected it to their modem and it went online perfectly. I brought my tower home and tried hooking it up again, but still nothing. When I hook up the modem to my laptop it connects fine, but it won't work on my tower. I also have a linksys router hooked up to it. When I plug the modem directly to the tower, the light that shows the ethernet card is working will not come on at all. When I plug the router to the computer and the modem to the router, the light comes on, but I am still not able to connect. Any help would be greatly appreciated. Thanks!!!