I have three printers connected to this computer. My default is a Panasonic KX-P4400 and suddenly when I tried to print to it today, I keep getting an error. It's a USB connection. I deleted the printer and re-installed it again with no luck. My other Panasonic KX-P7100 is a serial connection and I get the same error. I can print to my colour printer which is a Epson Stylus with a USB connection. I know that there is no a problem with the connection because as soon as I turn on the printer I can see it on my task bar. At first I thought it was a problem with spooling but yet I can still print to my colour printer. The only thing I installed recently was ZoneAlarm firewall. Could that possibly be the problem?