Required field in contact form 7

I’m trying to make this field required but it does not work. How can I make it work?

<div class=”input-wrap”><i class=”icon-user”></i><br style=”display: none;”>
<span class=”wpcf7-form-control-wrap text-102″>
<input type=”text” text* name=”your-name” value=”” size=”40″ class=”wpcf7-form-control wpcf7-text wpcf7-validates-as-required field-name wpcf7-not-valid” aria-required=”true” aria-invalid=”true” placeholder=”?νομα”>