ImpulseWine on "[Plugin: Contact Form 7] Can setup contact form"

I'm trying to create a "Contact Us" page for my site. I've created a new page, and in Edit Page I click the "Add Contact Form" button above the text box, I setup the contact form how I want and then I click the "add this form to my post" button, but the button doesn't work. I can't add a contact form to the post. I've tried it in different browsers too.
What's the problem?

http://wordpress.org/plugins/contact-form-7/