I'm really confused. I have a Dual 2Ghz G5, with 4GB of Ram. I have authored a DVD with DVDSP 2. When I try to view this DVD, on this same Mac, it ejects it. When I put the DVD into a desktp player, all is well. This sinario has happened twice.
I've had similar problems in the past (but not recently). Anyway, this question come up every so often and I don't remember ever seeing a definitive answer. The general suggestion is to try different/better/name brand media, and/or try a different type (DVD +R, instead of -R, etc). I suggest posting your problem again in the DVD Studio Pro forum on the Cow, maybe you'll get a better answer. Sometimes, just burning another disk will work, so you may want to try a couple more. Try your disk on different Mac's as well - if you can.