How to send data from flash to unity?

I'm a newbee of both flash and unity and I'm trying to do web AR using FLARToolkit and Unity. I have no idea on how to send FLARToolkit's data(the marker's position and rotation) to unity. Followed the faq of the thread http://forum.unity3d.com/threads/116650-UnityShared.swc-Communicating-between-Unity-Flash-Content-and-AS3.?p=922340&viewfull=1#post922340, it dose work that flash successfully sendmessage to active a function of unity but the data isnt there.

The AS looks like:

 public class SimpleLite extends FLSketch
     {
         ... 
         private function _onEnterFrame(e:Event = null):void
         {
             ...
             unityContentRef.sendMessage("FlashUICommunicator", "ChangeWallColour");  // works
             var x:Number = this.markerPositionMatrix.m03;
             unityContentRef.sendMessage("FlashUICommunicator", "UpdatePosition", {x:Number});  // dosent work
             ...
         }
         ...
     }

In the unity c# it looks like:

 public void UpdatePosition(float exampleObj)
 {    
     #if UNITY_FLASH
     t.transform.position = new Vector3(exampleObj, 2.841496f, -54f);
     #endif
 }

I have scratched my head...