Mesh separating from skeleton in animation

Development Character & Animation
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1

My skeletal mesh works fine in Motion Builder and 3DS Max but when I import to UE4 the mesh and bones separate in the animation. Any thoughts as to why this is happening? Thank You.

297977-ue4animation.jpg
297977-ue4animation.jpg1154×615 72.5 KB

2

298164-fixed-anim.jpg
298164-fixed-anim.jpg1115×530 43 KB

Imported the animation today with a project that was converted from 4.23 with the same settings and it works. No idea why.