Trim marks in Acrobat 7 Professional

[pearlrosenberg at nc.rr.com]

Hi Framers,

FrameMaker 7.0p578
Adobe Acrobat 7 Professinal

I created a document in FM with a custom-sized page – 6.5 x 9 and then 
created a PDF. In Acrobat, I went to Tools/Print Production/Add 
Printer Makrs and enabled Trim Marks. I printed the document on 8.5 x 
11 paper, but there are no marks in the corners to show the boundaries 
of the page.

I haven't done this before, so maybe this is not the correct method. 
Can someone please tell me how to print a smaller page on a larger 
paper with makrs in the corners to delineate the boundaries of the 
page?

Many thanks.
Pearl Rosenberg
TeleHealth Services