Action actuator won't work in game engine!

I’ve got this robot arm that has an armature and i’ve animated it but then it won’t play in GE. aNY IDEAS?

What version of Blender are you using?

If you are using 2.49b or older, you must parent the mesh to the armature using Ctrl+P, you cannot use the armature modifier. First remove the modifier, then create a real parenting relationship with Ctrl+P and select “Armature” from the popup.

Thanks Blendenzo!