Mark my time ! Help !

I created a timeline with two buttons who track a line (_xscaling, _yscaling) from within a control MC.

onClipEvent (load) {
mcLine = _root.line;
mcBut1 = _root.but1;
mcBut2 = _root.but2;
}
onClipEvent (enterFrame) {
mcLine._x = mcBut1._x;
mcLine._y = mcBut1._y;
mcLine._xscale = mcBut2._x-mcLine._x;
mcLine._yscale = mcBut2._y-mcLine._y;
updateAfterEvent();
}

Now i have to attache some mc's on this timeline (timemarks).

How can i do this without scaling/distorting the attached mc's?

I putted the swf somewhere online: http://users.pandora.be/c.v.a/timeline/timeline.swf

Thank you,

Thothomas