Change beginFill in duplicated mc

1

hi,

can I change the beginFill color in a duplicated movieclip?

this.createEmptyMovieClip('col1', 1);
with (_root.col1) {
    lineStyle(0.1, 0x000000);
    beginFill(0x000000);
    lineTo(10, 0);
    lineTo(10, 10);
    lineTo(0, 10);
    lineTo(0, 0);
    endFill();
}
duplicateMovieClip("col1","col2",2)
col2._x=11;
//this doesn't work:
col2.beginFill(0xFF0000);