neck bone does not work in Blender 2.69

Hello everybody,
i downloaded blender 2.69 recently and now any of my models, wether they are old or new have the same problem:
when i move the neck-bone of the human-meta rig nothing happens. When i open the same files with blender 2.64a everything works well. Does anybody know what`s happening?

Do you get any errors at the top of the blender window ?
File / User preferences / File, try and enabling ‘Auto Run Python Scripts’ before opening your file

Yeah, that was it.
Thank you very very very much!