PixelMask ignore transparent texture.

[ivan-shaban]

Hi, i've next strange trouble. I should display mask in form of rounded rect, if i create that rect by program code (draw in common sprite > bitmapdata > texture > image), all works fine, but if i use prepared asset from atf-atlas, it looks like common rect without rounded corners. What i miss?
Examples:

var roundedBD : BitmapData = DrawRoundedAvatarUtil.draw(new Bitmap(new BitmapData(178, 178, false, 0x000000)), 36);
shadowMask = Image.fromBitmap(new Bitmap(roundedBD));

Asset: