I have 3 Cisco Catalyst 3560G-24PS - switches. All work beutifully except, I have 2 printers on one of my switches that I can't ping. The other printers on the other switches work perfectly. I have reviewed the setup and can't seem to figure out what is missing. Status is correct, uplink light is green, Speed, Duplex, and PoE are set correctly. Has anyone seen anything like this before?