No page headers and footers are controlled by the main report.
What you can do is
-- add a top-level group to the sub-report
-- set the field to =1 (or any constant)
-- close the Sorting and grouping dialog
-- Copy the Page header controls into the group
-- Set the Group's Repeat Section property to True (Yes)
John Spencer
Access MVP 2002-2005, 2007-2008
The Hilltop Institute
University of Maryland Baltimore County