DEFORMED MESH

i want to use both magnetostatics and transient moving mesh on a magnet. my geometry consists of 2 permanent magnet(fixed on either end), and a permanent magnet in the middle. i want to apply deformed mesh on the middle magnet and look at the magnetic flux lines that interact between them.
so far i've been able to create the magnetic flux lines of all the magnets but i cannot get the middle magnet to move.
can someone help me with this please.