I have this pro set ethernet in my main computer connected from the router which has 4 more computers connected to it. I connected the Realtek RTL8139 Family PCI Fast Ethernet NIC in the main computer and used it as the modem for the wireless broadband internet connection. From the other ethernet card pro set, I connected an outgoing cable to another 8 port switch. Both ethernets's status says "connected" but only mymain computer can browse the internet and the rest of the computers cannot. Why is that so? Please help, anyone?