Canon Printer stops working (software issue?)

have my Canon iP4200 printer hooked up to my iMac and have been using it for years with out any problems until today. When i try to print something nothing happens. In the Printer queue application thing in the dock, it shows the document in queue and its status is "printing". On top of the window it shows this message: 'GenericClass: waiting for device' whatever that means i assume thats the issue but have no clue what it means. I have so many things to print for uni and need to get this working again, how do i get it back to working order again??