wessidemd, if you go to Control, check "enable simple frame actions", and then Control > Play, it will acknowledge the stop() in AS2 (and I assume other actionscript as well). I haven't used Flash CS3 much but I remember this working back in Flash 5 as well. I have more experience using Director where it's common practice to test on the timeline like this. I don't know why this feature would be removed in Flash CS3.