I’ve actually used Syntheyes and AE together several times, and it works well. I think what you are doing wrong is parenting your tracking layer to the Null generated by SynthEyes. The nulls don’t actually move, they represent points in space in the scene and the camera moves, so parenting to the null isn’t going to change anything. What I usually do, is copy the position data of the null in the scene I want place my object near, and paste that into the 3d position property of the layer I want to add to the scene, then scale that layer appropriately. Also, make sure that your composition is set to view through the camera that Syntheyes created.