Bone Animation Jittering

Hi,
I imported some animations on one skeleton from Maya into unreal. Everything is fine, except the animation keeps jittering. The chain is long with about 15 bones. The end of the chain seems to jitter a lot and is unusable. I checked the fbx animation and it has no jitter.

My first attempt at using the sequencer for a real project, and :-(.

Please help urgently, else I will need to abandon my dreams of a renderless world…

Thanks.
Manish