Exported SK_Mannequin re imported Not playing default animations anymore.

Basically I am trying to create my own dismemberment system and decided to export the Mannequin in to 3dsmax. I then broke the mannequin down in to separate body parts By removing the mesh parts until I was left with the ones I want & exported each with the original skeleton.
On import to ue4 I selected the Default Mannequin skeleton and also applied the original pyhsics asset to each part and removed the bits I didnt need.
Everything seems fine.
But when I create a character blueprint and And add each separate skelemesh bodypart until i have a full body None of the default animation blueprint animations work :frowning:

What did I miss?