3D Flag question

Hey all,

Not sure how this works. I created an animation...I morph into a flag. I would like to add 3D flag to this and ease into the waving. Problem is, you can't seem to be able to ease into it. Once applied, it starts and the flag jumps back as if the camera position changes. I've tried a lot of different things, gravity, flag pole position. How do I get this to be a smotth transition into the flag waving?

Thanks