First time with dual layer

This is the first time I'm burning a dual layer disk and there's a problem getting a break-point set when I go to format the disk. There are five major video files and one menu with 5 buttons. Each of the video files have only one chapter They vary in size considerably: 2.34G, 2.02G, 1.68G, 543MB and 150 MB. When I go to format it says a suitable marker could not be found. I've selected red laser dual and OTP in the menu, then automatic break point and also one side and 12 cm.

Can you spot what I'm doing wrong here?

Thanks!
Craig