my problems solved with the helps of this user, So Why I cannot rate this user? I have rate him before this on other thread, so when I create other thread, He also help me solve my problem.When I try to rate him again, I got this message. I always got this message every time I want to rate the same user on other thread.

PHP Code:
You must spread some Reputation around before giving it to Hell-Lord again. 
How to solve this problem?