Lacie Drive Dual Layer Problems

Recently bought the lacie 16x d2 DVD±RW Double Layer external drive.

It basically a NEC 2510A drive (I believe) firmware 2.07 (was 2.05 when I got it)

I have tried burning to it with a number applications Nero 6, Clonedvd2 but I am getting errors (nero tells me there isn’t enough room on the disk - even though it recognises its a dual layer disk etc).

Media I am using are: DVD+R DL Traxdata

I can burning single layer and cds fine the only problem is with dual layers

I have looked on the NEC site and the latest firmware is 2.16 but you can only upgrade from version 2.15??

Anyone else had experience of this? or any suggestions on what I can try?