Can burn with DVD+R, but not +RW

I have the BTC 1008 and have had great results burning to DVD+Rs (Ritek). However, I haven’t had any luck at all with DVD+RW. I’ve tried the Ridata 4x DVD+RW disk as well as Verbatim and TDK 2x RWs (both work on my Philips 985 set top recorder. The last time I tried burning with Nero, it said I had a positioning error. Anybody got any suggestions?

Did you try going to BTC’s website and doing a Flash ROM update on the drive? It may be that the brands you are trying have not been added to the drive’s ROM and the drive is unable to calibrate to this dye type. What does the manufacturer recommend for RW on this drive?