Taking the Core App Skills Exam

I hope someone can answer this for me. I am trying to retake the Core App Exam (Capstone Quiz) and seems that I do not have anymore attempts. Is there period of time where i have to wait until i can take it again or is that it for me? How do i reset it? Its 2 part and i have part 1 completed, but now im stuck because i can not take part 2. HELP Please.