Disabling "Enable Rest Position"

Hi Folks,
I ran into this problem when I tried to parent my chess piece to my hand. Any time I set the "weight" to zero for the hand to release the piece, the piece would return to its original position on the board. I had to uncheck the "Enable Rest Position" box in the attribute editor for the piece. After that it stays put when it gets dropped off.
I hope that this is helpful-P