Mancandy arm problem

Hello, I’m trying to use mancandy for testing character animation, but his arms don’t move the way I expected. There seems to be an IK_solver constraint so that a bone name targetArm.L should move the left arm, but when I move this bone the arm does not move at all.
Has anyone ever met this problem with mancandy ?
I’m using blender 2.42a on windows, and the mancandy blend that can be found on the orange site mancandy page.

Oh, I finally discovered there’s a slider named “influence” which controls the influence of the IK bone on the IK chain.
Well, sorry for this useless post, I’ve figured out the answer on my own…