Oh no! my movie's stuck!

Hi, everyone! I’m new, so hello world! (as most novices come across)

I’m now doing a presentation, but am not familiar with actionscript, so it’s all pretty raw stage frame/layer work on a single timeline and 'bout 10 scenes, in total 'bout 17000++ frames :stuck_out_tongue: But the problem is that towards the end the movie just stalls at a frame and doesn’t move anymore!!! 'cept when I do the Ctrl±-> thing! Annoying T_T. So is this suppose to happen because I exceeded the limit (if there is one in the first place), or did I need to add a script like gotoAndPlay or something?