3Ds max - I cannot rotate my hand using HI Solver



I finished this tutorial https://www.youtube.com/playlist?list=PLnKw1txyYzRlxh1-BT4CifPXC5TBg2vUd and I fully rigged my character but one thing is wrong. I cannot rotate my hands using IK controllers. I can move them but not rotate. I checked these tutorials files and in them tutorial character can roatate hand using IK controller. I spended a lot of time trying figure it out but nothing. Please help.

My rigg is attached to download here: