Because of unknown reasons, my account had been suspended (and according to Google search, some people have the same problem). So I had sent a support ticket in August 30 2014. And three days ago, in September 23 2014, they finally unsuspended my account YAY!!! Now I can withdraw my money instantly and continue to do task at CrowdFlower Elite. If you want to participate CrowdFlower Elite, go here . Many thanks for Keven, you got my appreciation
Below are my screenshots of support ticket and reply by CrowdFlower