Printing 4 up 6x9 pages on 11x17 and not aligning up

Question

Trying to print 4up 6x9 pages on 11 x 17 paper duplex. Indesign layout is exacetly the same for all the pages. When I print the odd page is not aligned up with the even page. Example the header and bottom page number doesn't align up with the side of the page.
I even printed one page first and feed it back in the printer to print the next page. It's close but still off a little bit.
Can someone tell me if I'm missing something here or what my layout is not setup.
I appreciate it.
Thank you.
Aloha

Answer 1

While Eugen is coorect about what I'm asking, his solution may not work on every printer. Even relatively expensive commercial printers like the Minolta BizHub series and similar products from other vendors don't have the same sort of sheet-to-sheet tolerance for alignment that yo will find with a printing press because they use differnt technology for moving the paper through the machine.
It's not unusual to see drift through a long run of up to 3mm or .125 inch overall acros both the length and the width of the page when working with digital printing equipment. In general that's within the machine tolerance specifications (+/- 1.5 mm) for page-to-page registration, and the only thing you can do is design to account for the possibility and use margins large enough to hide a discrepancy.