Removing clips from the timeline in as 3.0

Try this test:

Creat a new Flash movie with 2 bank keyframes.

Draw a rectangle on the first frame, convert it to a movieclip and give it an instance name of testSym

Add this code to the first frame:

////////////////////////////


removeChild(testSym);

testSym = null;

/////////////////////////


and then this code to the second frame:

//////////////////////


trace ("FORCING GC");
try {
new LocalConnection().connect('foo');
new LocalConnection().connect('foo');
} catch (e:*) {}
stop();

// this forces the garbage collector but is not recommended for published products
///////////////////////

give the rectangle movie clip 2 blank keyframes too. Put this code in the first frame:

///////////////////

trace("I'm still here");

/////////////////////

and this code in the second:

///////////////////

gotoAndPlay(1);

///////////////////

Now run the movie - I assumed that the clip would be marked for garbage collection and collected by the forced collect, but it still persists - presumably because it was put statically on the timeline?

Is there any way around this? Surely there must be a way to remove movie clips that have been placed statically on the timeline at design time rather than adding everything using code? Can anyone help?