i have made full body rigging with all the control system in MAYA 5.
but now when i open that file in MAYA version 7, it doesnt work properly. what happens is when i move the body with global controller or main root joint legs dont move they stay there & stick there. my heel joints of both the legs stays there. they do not move.

This only happens in maya 7. it works properly in maya 5.
plz i need help.i am very very confuse.
thanks.