Error 1000: Ambiguous Reference when embedding from a package

[Wastelander]

Hello everybody,

I am encountering an issue I really can't find a solution to. When embedding assets in a class file and assigning them to a variable of the Class type, I get a compiler error 1000 "Ambiguous Reference". This ONLY happens when I move the class file into a package. Leaving the class file in the main source folder results in no errors, but I am not satisfied with this solution. Here's the source code for one of my classes.

(EDIT)
Some clarifications:
I am not using any namespaces, at least not explicitly.

My first assumption was there would be a problem with the build path, so I added the "assets" folder to the project paths and tried referencing the embedded files directly (just source="filename.png"). Again, this works flawlessly from the default package, but not from any other package.

Flash Builder 4.5 shows two errors for each embedded asset. These for example relate to IMG_COMPASS_ARROW:
1000: Ambiguous reference to GravityCompass_IMG_COMPASS_ARROW.
Can not resolve a multiname reference unambiguously. GravityCompass_IMG_COMPASS_ARROW (from GravityCompass_IMG_COMPASS_ARROW.as) and comp:GravityCompass_IMG_COMPASS_ARROW (from comp\GravityCompass_IMG_COMPASS_ARROW.as) are available.

package comp  
{
    import flash.display.Bitmap;
    import flash.geom.Matrix;
    import flash.geom.Point;
    
    import mx.core.UIComponent;
    
    public class GravityCompass extends UIComponent
    {
        
        [Embed(source="assets/img_compass_bg.png")]
        private static const IMG_COMPASS_BG:Class;

        [Embed(source="assets/img_compass_arrow.png")]
        private static const IMG_COMPASS_ARROW:Class;
        
        private var _backgroundImage:Bitmap;
        
        private var _arrowImage:Bitmap;
        
        private var _arrowRotation:Number;
        
        private var _bgCenterX:Number;
        
        private var _bgCenterY:Number;
        
        private var _arrowCenterX:Number;
        
        private var _arrowCenterY:Number;
        
        
        public function GravityCompass()
        {
            super();
        }
        
        override protected function createChildren():void {
            _backgroundImage = new IMG_COMPASS_BG();
            _arrowImage = new IMG_COMPASS_ARROW();
            
            _bgCenterX = .5 * _backgroundImage.width;
            _bgCenterY = .5 * _backgroundImage.height;
            _arrowCenterX = .5 * _arrowImage.width;
            _arrowCenterY = .5 * _arrowImage.height;
            
            _arrowImage.x = _bgCenterX - _arrowCenterX;
            _arrowImage.y = _bgCenterY - _arrowCenterY;

            addChild(_backgroundImage);
            addChild(_arrowImage);
        }
        
        override protected function measure():void {
            measuredWidth = _backgroundImage.width;
            measuredHeight = _backgroundImage.height;
            measuredMinWidth = _backgroundImage.width;
            measuredMinHeight = _backgroundImage.height;

        }
        
        public function set direction(p:Point):void {
            
            // Calculating the angle between p and the upward 
            // pointing vector (0, -1) using the well known formula
            // cos(angle) = v1 * v2 / |v1| * |v2|
            var angle:Number = Math.acos(-p.y / p.length);
            
            if(p.x < 0) {
                angle = -angle;
            }
            
            var m:Matrix = new Matrix();
            // Moving the graphic's center to the origin
            m.translate(-_arrowCenterX, -_arrowCenterY);
            // Rotating around the origin
            m.rotate(angle);
            // Moving the graphic's center back
            m.translate(_arrowCenterX, _arrowCenterY);
            // Then move it to the background graphic's center
            m.translate(_bgCenterX-_arrowCenterX, _bgCenterY-_arrowCenterY);
            // Write the result back to the graphic's transform matrix
            _arrowImage.transform.matrix = m;
        }
    }
}