PHP会话ID问题

我有一个网站，在刷新页面之前，网站上的某些内容不会出现。

我在我的代码session_start();中发现了这一点。如果我删除我的PHP会话ID，我页面上的东西再次消失，似乎这个会话需要设置在第一个页面加载。。。有人知道怎么做吗？

顺便说一下，不会出现的是一个表单，一个GET表单。

感谢

这是会话的代码

function wpsc_core_load_session() {
    if ( !isset( $_SESSION ) )
        $_SESSION = null;
    if ( ( !is_array( $_SESSION ) ) xor ( !isset( $_SESSION['nzshpcrt_cart'] ) ) xor ( !$_SESSION ) )
        session_start();
}

他就是没有出现的人

<form class="product_search" style="font-size:0px !important;" method="GET" action="<?php echo $pp_url?>/" >
                <input name="product_search" id="wpsc_search_autocomplete" class="wpsc_product_search wpsc_live_search_embed .wpsc_live_search" autocomplete="off" style="padding:0px !important; height:25px !important; vertical-align:top;" />
                <script type='text/javascript' > /* <![CDATA[ */
                    jQuery('#wpsc_search_autocomplete').keypress( function(e){
                        if ( e.keyCode == 13 ) {
                            var url = '<?php echo $pp_url ?>'+'?product_search='+jQuery(this).val();
                            url = encodeURI(url);
                            jQuery(window.location).attr('href', url);
                        }
                    });
                     /* ]]> */
                     </script>
                     <input type="submit" id="button" name="button" class="searchBtn" value="GO"/>
            </form>

我打开了Wordpress调试器，这就是的结果

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/content/19/9468119/html/wp-content/plugins/jquery-colorbox/jquery-colorbox.php:34) in /home/content/19/9468119/html/wp-content/plugins/wp-e-commerce/wpsc-core/wpsc-constants.php on line 13
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/content/19/9468119/html/wp-content/plugins/jquery-colorbox/jquery-colorbox.php:34) in /home/content/19/9468119/html/wp-content/plugins/wp-e-commerce/wpsc-core/wpsc-constants.php on line 13

当丢失的表格在那里时，就会显示此消息。。。。

Notice: A session had already been started - ignoring session_start() in /home/content/19/9468119/html/wp-content/plugins/wp-e-commerce/wpsc-core/wpsc-constants.php on line 18