Try temporarily shutting off Windows Firewall and try the ping again. If it works, I'll bet the add printer will work now.-------------------------------
I have ran a Program called Advanced IP Scanner. It shows My Router, Network Adapter, Ipad, Cannon Printer the IP's and MAC Address.
When i Ping the Printer from the Program i get: Request Timed Out, Packets Sent = 4 Received = 0 Lost = 4 100% Loss.