Many thanks Dr@Hossein, the Variable is used both Mediation and Moderation in some papers according to the context they introduce it. in my thesis i used it as Moderator, but i thinks to use it as Mix Moderator-Mediator. but searching for one study that used the same variable as Moderate-Mediate ;)
But how can you explain the counter intuitive argument that independent variable should not have a relationship with moderator which is violated if the same variable is acting as mediator.