ix6820 not recognizing 13*19 paper

I am using Lightroom. Set up paper size 13x19 in the Print Setup dialog.

When I put the paper in, it kicks it through without printing. The yellow light blinks twice for incorrect paper size.

When I turn off detect paper size, it starts printing, but only prints a 3" wide strip of the picture.

The printer firmware is up to date.

Any suggestions?

Thanks,

Michael