CorrelationToken problem !!!

Question

Hello every body ! Well, the problem which I am in front to it, is that target activity CorrelationToken can't be affected to the the contained activity in the custom activity. for example DeleteTask acitivity must have the same correlationtoken of CreateTask activity, and when I desgn a custom activity which contain deletetask activity I can't affect the CorrelationToken and the Workflow Failed in starting. What's the problem ? I need your help please !