Thanks for the reply. Your first link isn't working. There is more than one type of ethernet network cable?! It was hard for me to find one this length at Radioshack, and it turns out I have the wrong one.

I looked at the wire, the RED Blinker, and it says CAT-5e. Same goes for the one that connects the router to the modem. Not sure about the cable connecting the first comp (I'm using the cable that came with a PS3 =/). I'm still really confused. Can you explain a bit more "exact cable pairing".
Thanks in advance.
EDIT: I think I may have figured out the problem. The PS3 cable might be a CAT 6. I'll have to check it out. Thanks for the help!