Which firmware do I need?

I just both the Pioneer 110D dvd recorder and I already burned a dvd without problems. The problem that I have is that the drive doesn´t read some CD´s. I have to download a firmware? which one? I saw that are 2 different types of some versions: (DK,SV) or (BK, SV) I don´t know which one i should download.

You already posted this here: http://club.cdfreaks.com/showthread.php?t=166244

Please don’t doublepost, it’s not allowed in this forum.