VDaemon Error: Input element referenced by Control attribute not found

                            <li><a href="http://www.landscapeonline.com/vendor/signup/index.php?btype=s">Service Provider</a></li>
                        </ul></span></div>
                    <vlvalidator 
                        name='VendorTypeReq' 
                        type='required' 
                        control='vendor_type' 
                        errmsg='A Vendor Type is required.' />
                </td>
            </tr>