Welcome to the Adobe Forums!
Whenever you post a question here you need to understand that the people in these forums are fellow Adobe product users and NOT the people that work at the Adobe Help Center. It is also better if you list as much information as you can that will help us understand your problem.
Such as: How are you creating the PDFs? What computer platform you are on (Mac or Windows) and what system version? What program are you printing the PDF from and what version is that?