Sony DRU-820A problem

vbimport

#1

I have a sony dru-820a and a lite-on shm-165h65.
I burned a dvd with 820a, and 820a read it fine. but when I put it to the lite-on shm-165h65, nero say the dvd is empty. both are new and DMA is enable. I don’t know what’s wrong with them, can anyone tell me?

Thanks,

Derick