delete payroll result by batch

Hi guys. I want to build a program to delete payroll results by batch which I could specify the PERNR and the period of the payroll results. Program RPUDEL20 doesn't meet the require. It lists all the payroll results, but I just want to delete the latest one. So I try function RH_DELETE_STORED_PAYROLL_RSLTS, but i doesn't work. There  are some screenshots, could somebody check and tell me why it doesn't work. Thanks!