Contact Form 7

Im having an issue with CF7. I have used the following for the form whoch worked last week and now doesnt.

Any ideas?

<div class=”avia_ajax_form”>

<p class=”first_form form_element form_element_half”><br />
[text* FirstName placeholder “First Name*”]</p>

<p class=”form_element form_element_half”><br />
[text* LastName placeholder “Last Name*”] </p>

<p class=”first_form form_element form_element_half”>
[email* EmailAddress placeholder “Email Address*”]</p>

<p class=”form_element form_element_half”>
[text* VehicleRegistration placeholder “Vehicle Registration*”] </p>

<p class=”first_form form_element form_fullwidth”>
[textarea DamageDetails placeholder “Details about your damage”] </p>

<p class=”first_form form_element form_element_half”>
[file Upload1 limit:2000000 filetypes:gif|png|jpg|jpeg|pdf]</p>

<p class=”form form_element form_element_half”>
[file Upload2 limit:2000000 filetypes:gif|png|jpg|jpeg|pdf]</p>

<p class=”first_form form_element form_fullwidth”>Please answer these security questions | [quiz quiz-236 “9-1?|8” “2+5?|7” “9×9?|81” “12+4?|16”]</p>

</div>

<p>[submit “Request Quote”]</p>

Also, is there a way to style the boxes so they are the same size in height as the standard enfold form elements?

Thanks