Thanks for your response. Yes, regardless of how I add it (drag from browser within Toast, drag from Finder to Toast, right-click on file and specify open with Toast). It plays fine in DVD player. And I was able to open in in Toast before. It says adding files to Toast (in the kind of gray) and has the spinning bars in a circle but just hangs for days. I have 6GB of memory and plenty of hard drive space (SSD), so I'm kind of baffled. Also, Activity Monitor is not showing active disk i/o.