Hello, I have a designjet 800ps that I've brought back from the dead and I am wondering if Qimage will work with it or not?

I got it working, but it will only print images around 10 inches in either length or width. If I try to set the image bigger, the print stops at some point and not complete the print, or will leave a unprinted section in the image.

I've tried setting my paper to roll, but that doesn't do anything and I still have to manually enter a length paper which when the image stops printing it will roll out that length I enter and cut it off (I've wasted a bunch of paper) any tip on setting this up properly??