Tweenlite Animation problem

Hey, I’m using external Action-script files in a small project/assignment. I have several MovieClips which have controlled animations within the main timeline. Now I need to add a glow effect using the GlowFilter Plugin from the TweenLite library. But when I apply this filter, it causes the animation on the MovieClip to stop playing as normal.

If I did not provide some information you need I apologize and please let me know.

Does anyone know why this occurs and how to fix it?
Thank you for your help.

P.S This is the only line of code involved in this error(though there isn’t actually an error, the animation just doesn’t work).
TweenLite.to(choice_mc.area51_mc, .6, { glowFilter:{color:0x91e600, alpha:1, blurX:30, blurY:30}}