Required fields don't show asterisk

Thanks for your quick reply.

The site is not public, so I cannot send you a link.

The firebug source for the error is:

<div id="mc-response-area">
<div class="nm_mc_error">
EMAIL is required
<br>
FNAME is required
<br>
LNAME is required
<br>
MMERGE5 is required
<br>
Email address is invalid
<br>
</div>
</div>

The source code is:

<style>
.nm_mc_input{width:150px;}</style>

<div class="nm_mc_form">
  <input type="hidden" value="7" id="nm_mc_form_id-1353512381" />
  <ul>
        <li>
      <label for="EMAIL-1353512381">Email Address</label>
      <input type="text" name="nm-form-meta[EMAIL]" id="EMAIL-1353512381" class="nm_mc_input" />
    </li>
        <li>
      <label for="FNAME-1353512381">First Name</label>
      <input type="text" name="nm-form-meta[FNAME]" id="FNAME-1353512381" class="nm_mc_input" />
    </li>
        <li>
      <label for="LNAME-1353512381">Last Name</label>
      <input type="text" name="nm-form-meta[LNAME]" id="LNAME-1353512381" class="nm_mc_input" />
    </li>
        <li>
      <label for="MMERGE5-1353512381">Postcode</label>
      <input type="text" name="nm-form-meta[MMERGE5]" id="MMERGE5-1353512381" class="nm_mc_input" />
    </li>
        <li>
      <input type="button" class="nm_mc_button" value="Send" id="nm_mc_button-1353512381" onclick="postToMailChimp('DOMAIN/wp-content/plugins/nmedia-mailchimp-widget/api_mailchimp/postToMailChimp.php', 'DOMAIN/wplive/', '1353512381', '')" / >
     <img style="display:none" id="nm-mc-loading" src="DOMAIN/wp-content/plugins/nmedia-mailchimp-widget/images/loading.gif" />    <div id="mc-response-area">
	</div>
    </li>
  </ul>
</div>