Cant get to import an animation

I dont know what im doing wrong.

I want to export an animation from Blender to UE4. I already have the skeletal mesh imported into UE, and i want to import just the animation.

So i export the whole fbx from blender included the animation (it is included automatically anyways) and i go to unreal engine.

I import the fbx selecting the proper skeleton and checking import animations.

But then UE imports the asset as another skeletal mesh, instead of importing an animation for the specified skeleton. I did this exact same thing in the past and i never had problems. Maybe i forgot something.

Is there any special option when importing animations that im missing??

Thanks in advance.