MC won't disappear from Frame 1

Hi,

Frame 1 has a welcome screen
Frame 3 has a number of MCs which use duplicateMovieClip();

When users return to the welcome screen by pressing a button on frame 3, the MCs from Frame 3 are still there although they do not appear on the stage. Is there any way I can unload them somehow? I’ve tried removeMovieClip but that didn’t work…

wB