Cool Edit Pro users: Cool Edit will be fine and then -- I don't know if I use too many tracks or too many effects or what -- but it won't be able to save a mixdown of all the tracks. I'll be able to select certain tracks and mix them down together, but a certain track or tracks will be unable to be mixed down. I don't know what to do. I have the session saved and all the files and everything, but I can't mix it down. What do I do?