LG 4081B firmware upgrade



Hi !! I have a LG 4081, and when I try do multiples burners enable (I have a 4082B too at same computer), and if I use some dvdr brands like Ridata 4X Printable, and some others, I cant burn using the 2 burners.
I would like to try upgrade my firmware, because I think with this I will solve my problem.
But where I can find the upgrade firmware, and how I use the firmware ??

Hope someone can help me…