There is a bug on the lost code template. You need to edit nlp_vmail_lostcode template and replace the following code:
Look for:
Code:
<td class="panelsurround" align="center">
<div class="panel">
<div style="width:70%" align="$stylevar[left]">
$vbphrase[nlp_vmail_lostcodetdesc]<br />
$vbphrase[email_address]:<br /><input type="text" class="bginput" name="email" size="35" maxlength="90" value="" dir="ltr" />
$imagereg
$human_verify</div>
</div>
<div style="margin-top:$stylevar[cellpadding]px">
<br />
<input type="submit" class="button" value="$vbphrase[nlp_vmail_lostcodetbtn]" accesskey="s" />
</div>
Replace with:
Code:
<td class="panelsurround" align="center">
<div class="panel">
<div style="width:70%" align="$stylevar[left]">
<fieldset class="fieldset">
<legend>$vbphrase[email_address]</legend>
<table cellpadding="0" cellspacing="$stylevar[formspacer]" border="0" width="400">
<tr>
<td>
$vbphrase[nlp_vmail_lostcodetdesc]<br />
$vbphrase[email_address]:<br /><input type="text" class="bginput" name="email" size="35" maxlength="90" value="" dir="ltr" />
</td>
</tr>
</table>
</fieldset>
$imagereg
$human_verify
</div>
</div>
<div style="margin-top:$stylevar[cellpadding]px">
<br />
<input type="submit" class="button" value="$vbphrase[nlp_vmail_lostcodetbtn]" accesskey="s" />
</div>