NO 11X17 AVAILABLE

HELLO!

I recently purchased a Toshiba laptop for my shop. It came installed with WIN 8.1 (which I HATE)! I installed CDX5 because I have grown quite fond of it. I installed all the latest drivers for my EPSON 7510 printer, however when I attempt to print 11x17 images that selection is not available under the printer settings. This is very odd because I was able to choose 11x17 paper source on my previous laptop (Gateway). I have also updated CDX5 to service pack 3. What am I missing? Am I doing something wrong??