Attach movie issues

Im having some problems with attached movies…

I have a website, when you click a menu item it fades the current page out, and the selected one in. No problems with that, it all works well.

The only problem is, within those attached movies, all the actionscript doesnt work. I have, for example, a research page, which have 4 buttons, each of which attach a movieclip to and empty movieclip… Just a simple attachMovie function, but it doesnt work. If copy the research movieclip into a seperate flash file, everything works and the movies are attached fine, but in the website .fla, after the research page is loaded itself, none of the movies attach properly.

Are there any known issues with attaching movies within an attached movie?
If i need to make myself more clear please say…