The player script ALWAYS works fine, with AND without the throwing-code. The point is that the throwing code just doesn't work with the player code. When i just put the throwing code inside my script, and do not attach an action to the player (so that I use that default camera, after pressing "0") it works just fine...
Iam not able to understand why... with the player oode attached the arrow IS created but just stands still in the air (passable for some reason...). Is it possible that the WHILE-loop does not work for some reason?

Ja, lach du nur du haariges Pelzvieh!