Animation Events (Anyname.animevents) file, is a file for adding events to trigger during an animation being played, like a footstep sound or a particle event going off. It does not effect in any way how the animations play. You must look elsewhere for your problem. It depends on what 3d app you are exporting from, how you are importing it into the engine or finally, how you set the character up in your 3d app. We would need more info, so as to narrow down what it could be!