닉네임 없어졌어요...

  그런데 skin에 register.form.skin.php에 닉네임이 적용되어있는데 왜 회원가입 눌러서 보닌까

닉네임이 안나오네요 그리고 닉네임없이 가입누르닌까 닉네임을 입력하세요 라고뜨고 안되네요

<?php if ($req_nick) { ?>
        <tr>
            <th scope="row"><label for="reg_mb_nick"> Nick Name<strong class="sound_only"></strong></label></th>
            <td>
                <span class="frm_info">
                
                </span>
                <input type="hidden" name="mb_nick_default" value="<?php echo isset($member['mb_nick'])?get_text($member['mb_nick']):''; ?>">
                <input type="text" name="mb_nick" value="<?php echo isset($member['mb_nick'])?get_text($member['mb_nick']):''; ?>" id="reg_mb_nick" required class="frm_input required nospace" maxlength="20">
                <span id="msg_mb_nick"></span>
            </td>
        </tr>
        <?php } ?>