Volume slider bar wont work inside MC


I ahve created a volume bar in flash MX. The bar has a slider which the user can drag to adjust the volume. I need to place this within a MC with some other content. The volume bar has the sound attached to it which plays fine when previewing, however, the volume cannot be adjusted, the slider can be dragged but nothing changes to the sound.

heres my code for the slider, ‘sound1’ is the named sound and it does reside on level0:

volume = int(slider._x);

anyone have any great ideas?