Previously recorded dvr program to vhs

My cable people told me that when I have a program recorded onto the DVR, and when I play the program on the TV, I can record this program onto a VHS tape while watching the prerecorded DVR program. In other words copying the program or show that was recored earlier on the DVR, onto a VHS tape. How? I have S video line running from TV to VHS, also red and white “RCA” lines going to VHS recorder. But it is NOT recording the program onto the tape.
It is not recording the program to the VHS recorder, anybody know what I am doing wrong. Help is much appreciated.