You can have any name set for the calf, foot and thigh of your character as long as it's defined in the .chrparams, but make sure that the handle name is "RgtLeg01" for the right leg and "LftLeg01" for the left leg.
Console variables to see that the pose aligner is active is:
a_poseAlignerEnable = 1
Enables the Pose Aligner
a_poseAlignerDebugDraw = 1
Enables Debug drawing of plane weight, target and root offsets
a_poseAlignerForceWeightOne = 1
Forces weight to 1 which causes the limb to always adjust