I have an Epson Workforce 635. Without fail, when I try to print a 4x6" photo on photo paper, the printer says it's jammed. Yet it isn't. The paper just stops. When I print a full-sized sheet of paper for text or full sized photo paper, it prints just fine. I have brand new ink cartridges too. I've been looking for a problem for a week and can find nothing. The 4x6 photo paper simply will not work! What is going on?.