求高手帮忙，投稿页面有问题，提交不了

<?php
/*
Template Name: 投稿
*/
if( isset($_POST['tougao_form']) && $_POST['tougao_form'] == 'send')
{
global $wpdb;
$last_post = $wpdb->get_var("SELECT post_date FROM $wpdb->posts WHERE post_type = 'post' ORDER BY post_date DESC LIMIT 1");
// 博客当前最新文章发布时间与要投稿的文章至少间隔120秒。
// 可自行修改时间间隔，修改下面代码中的120即可
// 相比Cookie来验证两次投稿的时间差，读数据库的方式更加安全
if ( current_time('timestamp') - strtotime($last_post) < 120 )
{
wp_die('您投稿也太勤快了吧，先歇会儿！');
}
// 表单变量初始化
$name = isset( $_POST['tougao_authorname'] ) ? trim(htmlspecialchars($_POST['tougao_authorname'], ENT_QUOTES)) : '';
$email = isset( $_POST['tougao_authoremail'] ) ? trim(htmlspecialchars($_POST['tougao_authoremail'], ENT_QUOTES)) : '';
$blog = isset( $_POST['tougao_authorblog'] ) ? trim(htmlspecialchars($_POST['tougao_authorblog'], ENT_QUOTES)) : '';
$title = isset( $_POST['tougao_title'] ) ? trim(htmlspecialchars($_POST['tougao_title'], ENT_QUOTES)) : '';
$category = isset( $_POST['cat'] ) ? (int)$_POST['cat'] : 0;
$content = isset( $_POST['tougao_content'] ) ? trim(htmlspecialchars($_POST['tougao_content'], ENT_QUOTES)) : '';
// 表单项数据验证
if ( empty($name) || mb_strlen($name) > 20 )
{
wp_die('昵称必须填写，且长度不得超过20字');
}
if ( empty($email) || strlen($email) > 60 || !preg_match("/^([a-z0-9\+_\-]+)(\.[a-z0-9\+_\-]+)*@([a-z0-9\-]+\.)+[a-z]{2,6}$/ix", $email))
{
wp_die('Email必须填写，且长度不得超过60字，必须符合Email格式');
}
if ( empty($title) || mb_strlen($title) > 100 )
{
wp_die('标题必须填写，且长度不得超过100字');
}
if ( empty($content) || mb_strlen($content) > 3000 || mb_strlen($content) < 100)
{
wp_die('内容必须填写，且长度不得超过3000字，不得少于100字');
}
$post_content = '昵称: '.$name.'<br />Email: '.$email.'<br />blog: '.$blog.'<br />内容:<br />'.$content;
$tougao = array(
'post_title' => $title,
'post_content' => $post_content,
'post_category' => array($category)
);
// 将文章插入数据库
$status = wp_insert_post( $tougao );
if ($status != 0)
{
wp_die('投稿成功！您的文章将在审核通过后发布！','投稿成功！');
}
else
{
wp_die('投稿失败！');
}
}
?>

<?php get_header(); ?>
<div id="content" class="group">
<div id="page">
<?php if (have_posts()) : while (have_posts()) : the_post(); ?>
<h1><?php the_title(); ?></h1>
<div id="contribute">
<form method="post" action="<?php echo $_SERVER["REQUEST_URI"]; ?>">
<div class="authorinfo">
<label for="tougao_title">文章标题<span>*</span></label>
<input type="text" size="40" value="" id="tougao_title" name="tougao_title" />
</div>
<div class="authorinfo">
<label for="tougaocategorg">分类<span>*</span></label>
<?php wp_dropdown_categories('show_option_none=请选择文章分类&id=tougao-cat&show_count=1&hierarchical=1&hide_empty=0'); ?>
</div>
<div style="text-align: left; padding-top: 10px;">
<label style="vertical-align:top" for="tougao_content">投稿内容:*</label>
<textarea rows="15" cols="55" id="tougao_content" name="tougao_content"></textarea>
</div>
<div class="authorinfo">
<label for="tougao_authorname">昵称<span>*</span></label>
<input type="text" size="40" value="" id="tougao_authorname" name="tougao_authorname" />
</div>
<div class="authorinfo">
<label for="tougao_authoremail">E-Mail<span>*</span></label>
<input type="text" size="40" value="" id="tougao_authoremail" name="tougao_authoremail" />
</div>
<div class="authorinfo">
<label for="tougao_authorblog">您的博客</label>
<input type="text" size="40" value="" id="tougao_authorblog" name="tougao_authorblog" />
</div>
<br clear="all">
<div class="submitcon">
<input type="hidden" value="send" name="tougao_form" />
<input type="submit" value="提交" />
<input type="reset" value="重填" />
</div>
</form>
<script charset="utf-8" src="<?php bloginfo('template_url'); ?>/kindeditor/kindeditor-min.js"></script>
<script charset="utf-8" src="<?php bloginfo('template_url'); ?>/kindeditor/lang/zh_CN.js"></script>
<script>
/* 编辑器初始化代码 start */
var editor;
KindEditor.ready(function(K) {
editor = K.create('#tougao_content', {
width : '890px',
resizeType : 1,
allowPreviewEmoticons : false,
allowImageUpload : true, /* 开启图片上传功能，不需要就将true改成false */
items : [
'fontname', 'fontsize', '|', 'forecolor', 'hilitecolor', 'bold', 'italic', 'underline',
'removeformat', '|', 'justifyleft', 'justifycenter', 'justifyright', 'insertorderedlist',
'insertunorderedlist', '|', 'emoticons', 'image', 'link']
});
});
/* 编辑器初始化代码 end */
</script>
</div>
<?php endwhile; endif; ?>
</div>
<div class="c"></div>
</div>
<?php get_footer(); ?>