World location and local location of created object by ARTrackedImageManager

Hi Guys ,

I am trying to create an application and need to get the real world location of the object (Prefab) instantiated using ARTrackedImageManager. Checked the ARTrackedImageManager and was unable to get the how they did it…so at the end i tried to get the trackedimage.position and the result was (0,0,0) !!
How can i do it , please ?