animating prefabs

Hi all!

Simple question:

I made a prefab with a little animationclip inside (a sliding door over the y axis), and I want to put some of them around the level. The problem is that the animation seems on all the three axis and when I play the scene, all the prefabs moves in the x=0 z=0 position. I tried to remove x and z keyframe but it doesn't matter :( Is there a way to animate only one object axis and leave others two empty?

Tnx a lot mates!