TotalPageNumber of Mainreport pass to Subreport

How cann i pass the TotalPageNumber of Mainreport to Subreport? 

PAGE_NUMBER give me totalPageNumber then, when i give that Evalution Time "Report"

I have Subreport on the page Footer. I become TotalPageNumber after fill Report, but i need it on every page footer

How can i get the TotalPageNumber before fillJasper ? 

Sorry about my english

Thanks ..