screenwrap behaviour with physics

I�m making a simple asteroids clone and having some problems with the screenwrap behaviour together with physics:

ship and asteroids wont wrap while "gliding", also if I keep the movebutton("up" arrow in this case), the ship loses speed everytime it wraps.

Anyone know how to fix this? Have tried setting friction and dampening to zero but that did not help.

here�s a capx

https://dl.dropbox.com/u/61303567/asteroids.capx

If you check again the basic tutorial for physics behavior you'll see it's not recommended to "teleport" (which is what the wrap behavior does) objects with the physics behavior.

Also if you want to do a simple asteroid clone, why not follow this tutorial in which the wrap behavior don't cause issue ?

Physics is kind of overkill for an asteroid game.