[Resolvido] Erro ao inserir artigo

galera to usando o mesmo script de inserir noticias pra inserir artigo porem ta acusando esse erro:

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'deivid','2011-04-09, 15:04:17')' at line 1

meu codigos

cadastrar_artigo.php

<?php

require("confere.php");

require("conexao.php");

?><form id="form1" name="artigo" method="post" action="inserir_artigo.php">
 <table width="44%" border="0" align="center">
<tr>
 <td><strong>Título</strong></td>
 <td><label>
 <input name="titulo" type="text" id="titulo" size="60" maxlength="200" />
 </label></td>
</tr>
<tr>
 <td><strong>Artigo</strong></td>
 <td><label>
 <textarea name="artigo" cols="50" rows="2" id="artigo"></textarea>
 </label></td>
</tr>
<tr>
 <td></td>
 <td><label>

 <div align="right">
 <input type="submit" name="Submit" value="Inserir" />
 </div>
 </label></td>
</tr>
 </table>
</form>

inserir_artigo.php

<?php
require("confere.php");
include('conexao.php');

date_default_timezone_set('America/Sao_Paulo');

$titulo=$_POST['titulo'];
$artigo=$_POST['artigo'];
$dono=$_SESSION['usuario'];
$data=date("Y-m-d, H:m:s");

$sql="INSERT INTO artigos (titulo,artigo,dono,data) VALUES ('$titulo','$artigo,'$dono','$data')";
$query=mysql_query($sql) or die(mysql_error());

if($query){

echo 'ok';
}

?>

conexao.php

<?php

$host="localhost"; // Host name
$username="root"; // Mysql username
$password=""; // Mysql password
$db_name="login"; // Database name

mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");

?>

confere.php

<?php

session_start();

if(!isset($_SESSION['id']) || !isset($_SESSION['usuario'])){
header("Location:login.php");
exit;

}?>

tabela artigos

id int(11) AUTO_INCREMENT PRIMARY

titulo varchar(200)

artigo text

dono varchar(50)

data datetime