When you say " can't burn anything". what actually happens? - do you get an error message from Toast 7 or does it hang or just ignore the file you're trying to select? I no longer have my Toast 7 manual, but I would check that it does burn double-layer discs (I would presume that it works with DVD+R discs as well as DVD-R. Why are you using DVD+D - as I understand, they are best for storing data, and DVD-R best for movies.) Secondly, does your external Sony recorder work with DVD+R discs and/ or DVD-R, and does it burn double-sided (layer) discs? Why not try buying a pack of 5 cheap DVD-R from a supermarket (or DVD+R if you've made sure that's the medium of your external recorder) and try burning something one-layer and see what happens.