Haxe concurrency ( cpp.vm.Thread, Mutex, Lock ) on IOS

Hi,

I've recently tried to make my app run a little smoother while loading embedded resources and i was trying the above mentioned classes.
I've tried using the Thread class but when i compile with xcode i get a desyncronization problem ( i think ) - "warning: check_safe_call: could not restore current frame" and everything crashes (this happens only when i repeatedly call the thread method "create").

This is what i've tried :

Thread.create( caller );

private function caller() : Void {
sprite = new TextClass();
}

//// contents of textClass

package;

import nme.display.Sprite;
import nme.media.SoundChannel;
import nme.media.Sound;
import nme.Assets;
import nme.Lib;
import cpp.vm.Mutex;

class TextClass extends Sprite {

public function new() : Void {
super();
trace("test");

}

}

/////

I've never worked with threads so ... i was hoping for a step by step haxe example if anyone has something like this ...

Thanks a bunch