BD-ROM doesn't recognise writeable discs

Hey, I've got a LiteOn IHOS104-32 4x BD-ROM SATA drive and I can't burn discs. I'm using ISO Recorder and have tried one brand of DVD-RW, one brand of DVD+RW, one brand of CD-RW and one brand of CD-R. In all cases, ISO Recorder states that the discs are "Non-Blank Non-Writeable Non-Usable" and gives the status: "Cannot Use This Media". However, it can read the discs. The drive is new and I...