subreport as a reportparam not using the proper query

I am trying to use a report with a subreport, normally works fine, but I want to pass a query to the subreport, not let it use its internal query.  This works fine if I call the sub report by itself and hand it the query.  AS a report it runs fine.   When I use it as a reportparam it ignores the query.  Very very frustrating.