Panasonic DMR-ES30V: problem dubbing from VHS-C to DVD

[LEFT]When dubbing from VHS-C (requires an adapter cartridge) to DVD, my Pansonic DMR-ES30Vsometimes stops during recording and gives a “dubbing failed” message. I’ve tried both Manual and Quick Touch recording, with and without Time Limit on. Then other times it seems to record VHS-C without a problem. Any ideas :confused:[/LEFT]