Although I can share an internet connection my computer can't network with other comptuers on the network.  It doesn't detect them, and they cna't detect me.  I have a Netgear router for my cable modem.  At first things were fine.  Then a networked printing job failed to print anyhting but header/footers, then stopped altogeher, and now there's no detection going on.  I'm using EZ Firewall.