How do I stop a nested animation in Macromedia Flash from looping?

I know instancenames are involved but I must be doing something wrong because it wont stop!How do I stop a nested animation in Macromedia Flash from looping?
I haven't used flash in a while but I will attempt to assist you. What you want to do is in a Flash editor go to the last frame right click it and select create key frame. In the action script editor box you need to put in the code ';stop();';. You should be able to use multiple time lines using different frames and each one can have a script to stop whenever you want. If you still need help email me from my profile page.