I have DMR-E30 (new to me) which works perfectly with the only LM-AB120E cartridge disk I have. The manual recommends the following disks: LM-AD240E LM-AB120E LM-AF120E The machine will play any dvd film disk, cd's, and record from TV, camcorder, vcr, etc, and appears to be working perfectly. However, it will not use the newer Panasonic 3X ram disks: LM-AD240LE LM-AB120LE LM-AF120LE I contacted Panasonic and they said that it should use these disks and that I must have bought a bad disk. They sent me a 3X ram disk to try (LM-AF120LE) and it works perfectly. As I had already bought the following disks, which it will not use, I asked Panasonic for an explanation: 10 of LM-AF120LE 1 of LM-AB120LE 1 of LM-AD240LE The explanation given is that my DVR-E30 is 'faulty' and I need a Panasonic engineer. Can anyone enlarge on this please?