Cannot convert frameLabel

1

I’m getting a 1034 error can’t convert frameLabel

can anyone help?

    var labels:Array = new Array(); 
    labels[0] = shoeBoxes.selectedshoe1.currentLabels; 
    labels[1] = shoeBoxes.selectedshoe2.currentLabels; 
    labels[2] = shoeBoxes.selectedshoe3.currentLabels; 

    
    for (var l:Number = 0; l<labels.length; l++){
        var framelabel:FrameLabel = labels[l];
        
        //trace("frame " + framelabel.frame + ": " + framelabel.name);
    }