WPST, CSS

Hi

This is working fine
.wpst_question {text-align: justify; font-family: Lato;font-size: 14px; line-height: 20px;margin-bottom: 35px;}

This is not working.
.wpsqt_multiple_question {font-family: Lato;font-size: 14px; line-height: 20px;margin-top: 35px;}

I am trying to add a little more space between the question and the multiple choice answers and modify their font and size.
Thanks
Migo

http://wordpress.org/extend/plugins/wp-survey-and-quiz-tool/