게시판 삭제 질문입니다.

현재 view페이지에선 삭제가 제대로 이루어지고 있는데

목록부분에 체크리스트를 활용하여 삭제를 하면 삭제가 안되는 문제가 갑자기 생겼네요...

한번 확인하고 잘 되길래 아무생각없이 작업을 진행하다가 마무리 단계에서 한번더 확인을 하니...

올바른 방법으로 이용해달라는 오류창이 뜨네요 ㅜㅜ

무슨 문제인지 부탁드립니다 ㅜ

<div class="tbl_head01 tbl_wrap">
        <table>
        <caption><?php echo $board['bo_subject'] ?> 목록</caption>
        <thead>
        <tr>
            <th scope="col" style="display: none;"></th>
            <?php if ($is_checkbox) { ?>
            <th scope="col" style="position: relative; ">
                <label for="chkall" class="sound_only">현재 페이지 게시물 전체</label>
                <input type="checkbox" id="chkall" onclick="if (this.checked) all_checked(true); else all_checked(false);">
            </th>
            <?php } ?>
             <th scope="col">제&nbsp;&nbsp;목</th>
             <th scope="col">글쓴이</th>
             <th scope="col"><?php echo subject_sort_link('wr_datetime', $qstr2, 1) ?>날짜</a></th>
             <!-- <th scope="col"><?//php echo subject_sort_link('wr_hit', $qstr2, 1) ?>조회</a></th> -->
             <!-- <?//php if ($is_good) { ?><th scope="col"><?//php echo subject_sort_link('wr_good', $qstr2, 1) ?>추천</a></th><?//php } ?> -->
            <!--  <?//php if ($is_nogood) { ?><th scope="col"><?//php echo subject_sort_link('wr_nogood', $qstr2, 1) ?>비추천</a></th><?//php } ?> -->
        </tr>
        </thead>
       
        <tbody>
        <?php
        for ($i=0; $i<count($list); $i++) {
           
         ?>
        <tr class="<?php if ($list[$i]['is_notice']) echo "bo_notice"; ?>">
            <td class="td_num" style="display: none;">
            <?php
           // if ($list[$i]['is_notice']) // 공지사항
           //     echo '<strong>공지</strong>';
           // else if ($wr_id == $list[$i]['wr_id'])
           //     echo "<span class=\"bo_current\">열람중</span>";
           // else
                //echo $list[$i]['num'];
             ?>
            </td> 
            <?php if ($is_checkbox) {?>
            <td class="td_chk">        
                <label for="chk_wr_id_<?php echo $i ?>" class="sound_only"><?php echo $list[$i]['subject']?></label>
                 <input type="checkbox" name="chk_wr_id[]" value="<?php echo $list[$i]['wr_id'] ?>" id="chk_wr_id_<?php echo $i ?>">
            </td>
            <?php } ?>
            <td class="td_subject">
                <?php
                //if(isset($list[$i]['icon_reply'])&& !$stx){
                echo $list[$i]['icon_reply'];
                //}
                if ($is_category && $list[$i]['ca_name']) {
                 ?>
                <a href="<?php echo $list[$i]['ca_name_href'] ?>" class="bo_cate_link"><?php echo $list[$i]['ca_name'] ?></a>
                <?php } ?>
                <a href="<?php echo $list[$i]['href'] ?>"><?php echo $list[$i]['subject'].'&nbsp;'?>
                </a>
               

                <?php
                // if ($list[$i]['link']['count']) { echo '['.$list[$i]['link']['count'].']'; }
                // if ($list[$i]['file']['count']) { echo '<'.$list[$i]['file']['count'].'>'; }

                //if (isset($list[$i]['icon_new'])) echo $list[$i]['icon_new'];
                //if (isset($list[$i]['icon_hot'])) echo $list[$i]['icon_hot'];
                if (isset($list[$i]['icon_file'])) echo $list[$i]['icon_file'];
                //if (isset($list[$i]['icon_link'])) echo $list[$i]['icon_link'];
                //if (isset($list[$i]['icon_secret'])) echo $list[$i]['icon_secret'];

                 ?>
            </td>
             <td class="td_name sv_use"><?php echo $list[$i]['name'] ?></td>
             <td class="td_date"><?php echo $list[$i]['datetime2'] ?></td>
            <!-- <td class="td_num"><?//php echo $list[$i]['wr_hit'] ?></td> -->
            <!-- <?//php if ($is_good) { ?><td class="td_num"><?//php echo $list[$i]['wr_good'] ?></td><?//php } ?> -->
            <!-- <?//php if ($is_nogood) { ?><td class="td_num"><?//php echo $list[$i]['wr_nogood'] ?></td><?//php } ?> -->
        </tr>
        <?php } ?>
        <?php if (count($list) == 0) { echo '<tr><td colspan="'.$colspan.'" class="empty_table">게시물이 없습니다.</td></tr>'; } ?>
        </tbody>
        </table>
    </div>

    <?php if ($list_href || $is_checkbox || $write_href) { ?>
    <div class="bo_fx">
        <?php if ($is_checkbox) { ?>
        <ul class="btn_bo_adm">
             <li><input type="submit" name="btn_submit" value="선택삭제" onclick="document.pressed=this.value"></li>
            <!--<li><input type="submit" name="btn_submit" value="선택복사" onclick="document.pressed=this.value"></li>
            <li><input type="submit" name="btn_submit" value="선택이동" onclick="document.pressed=this.value"></li>-->
        </ul>
        <?php } ?>

list.skin 부분 소스입니다.

bbs부분의 php 소스는 건드리질 않았습니다.