Canon imageprograf 1000 won't print 5x7 matte photos

[Smcdan211]

I'm able to print using smaller 4x6 with the matte photo paper setting, but not 5x7 or any custom sizes. It's the recommended setting for the papers i use, red river aurora. Is there an equivalent media type or some way to force it to print 5x7/custom sizes? I also print borderless, but even when I don't it still won't work.