UE5, need help with firing animation

Scharl

Hi there, can somebody help me out....I've added a Rifle fire Input Action to my characters BluePrint and then added a Slot 'DefaultSlot' at the locomotion section...left mouse works fine but the characters legs stutter on left mouse... So I tried using a layered blend per bone on spine2 bone...Now my characters default pose is in an A-Pose and all other running ect animations dont work....Any help will do