Last night I bought a network hub to split my broadband connection into 4. (family) But I can't seem to get it to work on more then 1 computer. I plug the cord from the modem into the Uplink Slot on the Hub and my 4 computers into the 1,2,3,4 Slots. 1 Computer's internet will work..... but that's it, Any ideas why this problem would occur?

Unless your broadband modem supports NAT/NAPT, you will have to return the hub and purchase a router.