[URGENT] Animations inside MC's aren't working properly

Hello everyone,
I’ve been doing a project for a client lately, building a small interactive manual for an application.
I started off using Flash MX and Flash MX 2004 at my university, then moved it up to Flash 8 at my house. I’ve been switching between the different versions of Flash for this assignment (although i know its not the right thing to do), because I was virtually forced to.


The major problem I am having is that when I export the file to test it (the .swf file) all animations inside Movie Clips either:
a) Are jumpy/sketchy
b) Won’t appear
c) Won’t play (on rollover)

I’m in dire need of a fix for this asap, as this is due in a couple of days.
Any help is majorly appreciated, thank you.

Sincerely, Jason.