Ok, thanks for your help,but it did not work for me..:-(
(sorry i'm a noob in lite-c)
I have paste this code under the mainfunction as a new action.
When i open Wed i can assign an entity the behaviour colider.
But when i try to start the level, an error message appears:

'Error in Main line 24: syntax error
< function level_event()
>'

What i have to do?
By the way...which position in the script must be changed in "my" wmp level?^^
Thanks for your help!