Can't get Nero to burn

I have built a slide show using Pinnacle Studio 10 but can not get it to burn what ever I do. I get so far but when I click “Burn” the DVD ejects and a message appears saying, "Sorry your compilation cannot be burnt on this kind of disc so I change the disc from a DVD+R to a DVD-R but the same message comes up.

In order to burn to a Dvd, your project files have to be Dvd compliant, .bup, .ifo & .vob.