Contact Form Skinny Box Problem

After I installed Contact form 7 to my website, I inserted the shortcode directly to the page that I created without changing the default settings. Then I opened the page to check how it looks. I encountered a silly problem which I couldn’t find a solution with changing the code like 10/10 or something like this. The email box shrank to this form and it is like unchangeable. Please help me out to solve this problem.
Here is the page with Contact Form code: http://booklady.com/contact/

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