Why is it that I can only connect to one or the other, either my computer or PS3...

I can't keep a connection to the PS3, or even establish one for that matter.

I run a network with 3 connections, 2 computers, and the playstation 3, I'm constantly disconnected by nhl 07 as well.

My router only has 1 port I can't use, the others work fine, i've tried them out with both computers...

Just wondering why I can't use it