Sometimes the printers get confused, it's best to reset your computer if printing isn't working.
here are some things that might have happened...
1: Make sure you're connected to the WiFi network PVSD
2: Does the printer have an error message like a paper jam or something on the screen?
3: Check to see if the printer is turned on
If all of those are true and you still can't print then go ahead and Restart your Mac Book. (Click on the upper left hand Apple then click on Restart.)
That should clear many of the obstacles stopping you from printing - if not please Submit a Ticket
and we'll be glad to help