Scrollpane with movieclips

Hi

I gotta realy hard time getting this to work correctly. Im trying to make a movieclip and then attach movieclips to it and then load it into a scrollpane so I can scroll it. But Im not getting this to work.

This is my script
clip1 and clip2 are rectangles in my library.
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my_mc = _root.createEmptyMovieClip("my_mc1", 20);
temp = my_mc.attachMovie("clip1", "clip1", 1, {_y:0});
temp2 = my_mc.attachMovie("clip2", "clip2", 2, {_y:18});

mypane.content= "my_mc";
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mypane is a scrollpane on my stage.

What happens is that the my_mc clip loads onto the stage but it isnt in the scrollpane. Thats the problem.

Please somebody :(