Epson Artisan 837 will not print from IPhone

I have an IPhone 5 and an Epson Artisan 837 printer. When I attempt to print from my Ihone 5 I always receive an error message:

"out of paper, paper jammed, or incorrect paper size".

In reality,it is none of these things. I can print from my IPhone 5 to my Brother printer via the router connected to my computer, but the Epson is via WiFi/AirPrint.

Someone tried printing from their IPhone 5 to my Epson and it worked perfectly, but it WILL NOT PRINT FROM MY IPHONE 5.