IK handles don't work

I'm following the IK tutorial and used the setup wizard to create handles, but when I move them, the handles just move on their own and no bones move with them.  Here's what the wizard created:

IK_Hand_L constraints:

EDIT:  Just noticed an error in the console:  "Constraint dependency loop! The following joint/transform constraints depend on each other: IK_Foot_L (Inverse Kinematics), IK_Foot_L (Child Of), IK_Foot_R (Inverse Kinematics), IK_Foot_R (Child Of), IK_Hand_L (Inverse Kinematics), IK_Hand_L (Child Of), IK_Hand_R (Inverse Kinematics), IK_Hand_R (Child Of)"