unable to use mpirun in precomplied windows version

Hi,It's maybe a stupid question and I'm new to openfoam. but I can't use mpi to run job in paraell in precomplied openfoam at windows platform. I'm using mpirundebug -normal -np 6 potentialFoam -parallel and I'm getting

Error encountered:
    Unsupported WM_MPLIB setting : MSMPI

and I already installed msmpi like

Thanks for helping!