[fmx2004] disabling movieclips?

hey guys,

im aware of the movieclipinstancename.enable=false;

but i cant seem to get it to work.

I want it to work because i slide in a sound control panel over my content (also in a movieclip) but the mouse still reacts to mouse events of the content under the sound control panel. - eg i have a flash email form, and the icon changes to it…

Any suggestions?
Many many thanks,
JD