Well, after much research, i came to this link (http://www.gravityhelp.com/question/why-is-there-a-style-attribute-of-displaynone-being-added-my-form-isnt-showing-up/), wich basically tell me that if the conditional logic is enabled and my theme doesnt have the function cal wp_footer(), the form will not show.
Well, i can tell my theme have the wp_footer() call and when the conditional logic is enabled on some fields, the form simply doesnt show. Ive tried on every browser i know and the result is the same. Even in the pre-visualization (wich doesnt use my theme) i cant see the form.
You can see my form here: http://www.produzindo.net/pesquisa-de-perfil-e-de-opiniao/
As you can see, the style:none is there. What can i do?