[Plugin: Contact Form 7 to Database Extension] Delete from Frontend

Hi, I created something like you said, follows the logic that i used:
First I insert on field on wp_cf7dbplugin_submits table (status) set the default value “N”, after this, created a contact form named: anuncio. On my index page from front end, I used a sql query to get values using that both fields and listed by submit_time.
SELECT * FROM wp_cf7dbplugin_submits WHERE status = 'N' and form_name = 'anuncio' GROUP BY submit_time DESC
In my index.php (page that was listed all the records) I passed the values to a delete page (apagar.php) by submit_time (using id=submit_time). In page to delete (apagar.php) I used a simple sql function to delete the data by submit_time.
So my code stayed this way:

if ((isset($_GET['id'])) && ($_GET['id'] != "")) {
  $deleteSQL = sprintf("DELETE FROM wp_cf7dbplugin_submits WHERE submit_time=%s",
                       GetSQLValueString($_GET['id'], "text"));

  mysql_select_db($database_conexao, $conexao); //My mysql connection
  $Result1 = mysql_query($deleteSQL, $conexao) or die(mysql_error());//My mysql connection

  $deleteGoTo = "index.php"; //page to redirect after deleted
  if (isset($_SERVER['QUERY_STRING'])) {
    $deleteGoTo .= (strpos($deleteGoTo, '?')) ? "&" : "?";
    $deleteGoTo .= $_SERVER['QUERY_STRING'];
  }
  header(sprintf("Location: %s", $deleteGoTo));
}

And my link to this page: <a href="apagar.php?id=<?php echo $row_Anuncios['submit_time']; ?>">Delete</a>

Hope this help!