My folks have purchased a Toshiba SD23VB DVD/VCR from Currys. I went round to set it up yesterday, but have come across a problem. If the VCR component is on a TV channel and you play a DVD you can still hear the TV channel, as well as the DVD soundtrack. The machine is connected to the telly, via SCART and RF, but even if I disconnect the RF I still hear both soundtracks. Can anyone help, or do I need to go to Toshiba to tell me what I've done wrong?