Date Criteria in Subreport

I currently have two reports, each of which are based on 2 separate queries
that require date parameters to be entered by the user - Between [Beginning
Date:] and [Ending Date:]. I want to make them both show up on the same
report, so I made one be a subreport of the other. The problem is, when I
try to run the report, I am continually prompted to enter Beginning and
Ending Dates over and over again and the report won't generate. Is there any
way to make this work? I would need both the report and subreport to be
based on the same date range. Thanks in advance for any help you can offer!!