After sending your job to the printer, you might need to release the job using the controls on the front panel of the printer. To do that, follow these instructions:

If you find that the printer is in "Energy Saver" mode, press the button shown below to wake it up:

Then press the "Job Status" button at the left-hand side of the panel, and touch your name in the displayed list of jobs:

Finally, touch the file you want to print, then touch "Print" from the popup menu.