working with movie clips

OK, I am creating a flash movie (MX) which is an online sketchbook. The top of the movie contains thumbnails on a horizontal scrollbar. Each thumbnail opens the full size image below. Each full size image is another movie clip. The problem I have is removing the visible movie clip before a new one appears. It works fine if I select the thumbnails from left to right but if I select a thumbnail to the left, it appears underneath the visible movieclip.

The script I am using on each thumbnail looks like this:

on (release) {
tellTarget ("bedroomsketch", "_root.bedroomsketch") {
gotoAndPlay(2);
}
}

bedroomsketch is the movie clip that contains the full size image, Frame 1 has a stop action, Frame 2 displays the image. Can I use remove movieclip in some way to remove whichever movie clip is visible before showing the newly selected one?

Make sense? Any help appreciated.

Thanks.

Could we have a sample?

Btw telltarget is depreciated since v4

Cu