Philips dvdrw885 and ritek dvd+r dl: error



I get and ‘power calibration error’ when i try to write a disc with dvd decryptor onto a ridata (identified as RITEK D01 001) dual layer disc. The red burning led comes on, but after a few seconds it stops and gives me this error. Using w2k sp4, decryptor and nero (gives the same error). After the error nero still reports the disc as empty, so i hope i don’t have destroyed 2 discs…
Does this sound like an error which will be resolved with a new firmware (using the latest 1.7 at the moment), or can i throw away my very expensive DL discs?