Help sony dvd burner wont detect dual layer disk

hey i have a new sony DRU-700A and it wont dectect my dual layer disk, the disk i am using is a vertbatim disk, is there any reason y this is happening?

Hmmm… no idea why its behaving like that. U could try the latest firmware on it, or if ur up to it, flash it to a liteon 832S as they have more up to date firmware and better support(voids ur warranty tho). Look in the lite on forum for more details.

i figured it out, thanks any way booma, i was using clonedvd but when i used nero, it worked fine, it must be a issuse with clone dvd as i have a older version