you may have to set that manually using

powermt set policy

you can look up the syntax in powerpath documentation but in short you have to give a class parameter to specify what kind of devices (symm, clariion) you want to set the policy for..and then the policy

example command could be
powermt set policy=co class=clariion dev=all (for clariion devices)
powermt set policy=so class=symm dev=all (for symmetrix devices)


save settings after the change using powermt save

that should work...