i got a BIG problem

i got a BIG problem

man when i use an attachment to unit it doesnt work perfectly.for exemple:i take a paladin and i put on his left hand a shield but when he does a spel la holy ei or resurection a shield apears on the ground.why?

i ve got exactly the same problem but my is much bigger:
a shield or whatever i attach appears on the ground even when my model walks, stands, casts!!!!