Only partially printing document
I have a large format printer (24") and am trying to print a narrow, but long document in portrait mode. I have the custom poster setting set to 6.5" X 46". For some reason, the printer starts printing 10.5" from the bottom and will then print to the end and cut. The original document was created in inDesign, but I have also tried it in Illustrator, and exported to PDF and JPG. The document will not print correctly in any format. Is there a printer setting that I am missing?
This is the whole document area (6.5" X 46"):
This is the only area that prints (6.5" X 10.5"):

These are my current printer settings:


