DW-Q520A problem

i have install a new dw-q520a on my vaio laptop about two months ago and it was fine few days ago i was trying to burn a dvd with nero 7 and in the begining of recording i recieved this massage(POWER CALIBRATION ERROR)
whats wrong?please help me.


Disc Manufacturer ID: NANYA…
Media type ID: CHX
Please try better media and see if that works for you.


hi again
i used to work with princo media and some junk media but i havent any problem with those .any way i will try famouse media like sony or tdk and let see whats going on. thank you very much.