animation and collision

Hi Everyone,

I have a animation where my character reaches up and gets himself onto a ledge above himself, the problem I got is the collider doesnt move with the mesh so my mesh/character just falls back down. I have tried attaching the collider to the bones so it moves with the character but cant seem to get this working how id like. I wish the collider I had on there before would just move with the animation as, have been working on this for a long time now and not getting anywhere, any help appreciated.

thanks