Will Record onto disc but not play back

[Garry Johnson]

Recording to my hard drive works fine of all of my three drives, which are Plexwriter scsi 12/4/32,
Yamaha 4/4/16 scsi and a ultraplex cd-rom scsi all though this will only read discs custom assem not in play mode.
When i write to the disc drives it makes all the write noises etc, the disc is created and the tracks are present because it will re-record them back to the hard drive, even from the ultraplex cd-rom,but I just cannot get them to play from the drives themselves. I can record from disc to disc using disc juggler so all the drives seem to be fine.
My system is a P3 1GiG With over 650 Mb sdram, all the instalation instructions were done. Any thoughts ?
Many Thanks