Blue ray burner queston

[Kendle6661]

Have any of you had this problem, I have a LG 10x blue ray burner that has all of a sudden stop burning blue rays and DL dvd's. it will read any disc but won't burn

AMD FX 8120
MSI 990fxa-gd80
16g g.skill ripjaws 1333 ram
2 XFX 6950 crossfire
2 WD 2T 5400 rpm drives
WD 160g Raptor 10000 rpm
LG 10x bluray burner
Antec trupower 750 watt PSU
Antec 300 case