Wired network. I can print on its network all-in-one printer from one computer but not from another one. The computer from which I can't print connects to the internet and the other computers and I can ping the printer from it. The printer is visible on the router. When I try to print, it shows as printing on the printing status window but nothing prints. Whe I try to scan, I get the message that there is no connection. Any suggestions to cure the problem?