checkbox problems

Hi, I have the two website, and in both, I use the plugin contact form 7.
In one of the two, this is have problems of alignment problems that I do not know how to solve.

This is the website of the plugin work: http://www.iurisweb.com/contatti/

This is the website of the plugin not work: http://www.vincenzocorsaro.com/contatti/

I dont’ understand because this is not work.

Thanks in advance.

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