Flash Component creating rectangle at runtime

I have created a component to draw a rectangle at runtime. In class file i written as

class com.math.Sample extends MovieClip {
private var mcContainer:MovieClip;
function setXY(xaxis:Number, yaxis:Number):Void {
mcContainer._x = xaxis;
mcContainer._y = yaxis;
}
public function Dialog() {
}
public function popupBox():Void {
//background for pop-up window
drawRoundedRectangle(160,110,20,0x993399,50);
setXY(119,116);
}
//Draw rectangle background
public function drawRoundedRectangle(boxWidth:Number, boxHeight:Number, cornerRadius:Number, fillColor:Number, fillAlpha:Number):Void {
var d:Number = _root.getNextHighestDepth();
mcContainer = _root.createEmptyMovieClip("container"+d, d);
mcContainer.beginFill(fillColor,fillAlpha);
mcContainer.moveTo(cornerRadius,0);
mcContainer.lineTo(boxWidth-cornerRadius,0);
mcContainer.curveTo(boxWidth,0,boxWidth,cornerRadi us);
mcContainer.lineTo(boxWidth,cornerRadius);
mcContainer.lineTo(boxWidth,boxHeight-cornerRadius);
mcContainer.curveTo(boxWidth,boxHeight,boxWidth-cornerRadius,boxHeight);
mcContainer.lineTo(boxWidth-cornerRadius,boxHeight);
mcContainer.lineTo(cornerRadius,boxHeight);
mcContainer.curveTo(0,boxHeight,0,boxHeight-cornerRadius);
mcContainer.lineTo(0,boxHeight-cornerRadius);
mcContainer.lineTo(0,cornerRadius);
mcContainer.curveTo(0,0,cornerRadius,0);
mcContainer.lineTo(cornerRadius,0);
mcContainer.endFill();
}
}


I called this class file in my fla. Untill this part, my program working fine.
After then i have created swc and mxp file. Using swc and mxp this component is not creating the rectangle at runtime.

Please tell me what is wrong with this code.