Site title display bug or CSS bug

Hi! I am using the theme Lucida Free, it's beautiful and I loved it, but I'm facing a problem. The title and description still showing even with the check box in the customization option for showing the title plus the image being unchecked. I want the site to display just the image. I've tried a lot of CSS code for this kind of problem from other posts in this forum, but it didn't work. So must to have a specific Code for this theme or the place to fill with the CSS code is bugged. Any answer will be very appreciated. Thank you!