Create a Custom wheel !?

[stonecutter]

Well i created a custom wheel with blender its a little arrow you can use for a clock.

Now i create the wheel with the model editor i can load it and use it in the game but it shows only the handsymbol but i wont turn in any direction.

i created a shape and then a body and set the body to the model ... set the settings to wheel and then created a joint_hinge !

Now the problem it wont work ...
The joint_hinge , has it to be inside the green box oder outside , and whats about the parent and child thing ?