Pioneer A07 won't recognize ANY blank media

I’ve had this drive for about 7 months now and it’s worked great up untill a few days ago. It won’t recognize ANY blank media (even discs I just burned with it before it started acting up which play fine in my Sony dvd player) I updated the firmware (.21) but that was months ago nand it’s been fine up untill nowIt does play cd-rom’s and dvd-video with no problem…Any adeas as to what’s wrong with this thing ? Is this a common problem with Pioneer drives ? I’m looking at Plextor, LG (GSA 4163 BI),and NEC (ND 3520) as replacements (unless you can assure me this was just a fluke and I should waste my money on the Pioneer A08 : -)