Question and answer exchange programme with drupal 7

I want to create a question and answer exchange programme für my drupal 7 website. I installed the Fivestar module, so that users can vote answers. Now i want to give each user a score. The higher the score the more points other user will get for answering questions of this user. How can I realize this with drupal 7? I also tried the module Fivestar Userpoits but somehow it does not list the generated points. If users vote then I can not see a change in the user point history. How can I do what I want to do?

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