I can't install a firmware upgrade. The installer reports the printer is offline, but it isn't

Problem: I am having trouble installing the firmware 1.10 file on my iPF8300. For some reason the installer reports the printer being offline, but it isn't. I can print to the printer, the display is on, and everything seems to be awake. Additional details: Mac 10.5.8, updating firmware from 1.07 to 1.10 using Ethernet connection.

Resolution: Just having the printer online isn't enough. I had to load paper for the update software to work.