Passing the current record on a form to a report

I know it should be easy, but I can't find the way... I have my production bom card and I want to print it's components using a report I have created. On the card I use REPORT.RUNMODAL(REPORT ID,TRUE,FALSE, REC) to pass the current record to my report, but when the report opens and the requestfields screen appears the filter (production No. of REC) doesn't appear. What else can I do?.

Thanks,