Can't INSERT into database

Hi everyone, I need your help with this : I can't insert the content of in FCKeditor text field into tha database table.
Here is my code :

<?php
include_once("fckeditor/fckeditor.php") ;
?>

Add your comment
<?php
if (isset($_POST['submitted'])) 
   {   
      include ('config/mysql_connect.php');   
      
      if (empty($_POST['comment_text']))
      {
      echo '<p><font color="red">You have to write a comment.</font></p>';
      }   else   {      
               $comment = $_POST['comment'] ;
               }
      
      if ($comment)   
      {
      $query = mysql_query("INSERT INTO comments VALUES('','".$comment."')");
      $result = mysql_query($query);
      if (isset($result)) 
            { echo '<p><font color="red">Comment added successfully</font></p>';      } 
         else 
            { echo '<font color="red"><p>Comment not added.</p></font>';      }
      } 
   }      
?>


<form method="post" action="addcomment.php">
<p>   <b>Comment :</b>   <br />

<?php
$oFCKeditor = new FCKeditor('FCKeditor1') ;
$oFCKeditor->BasePath = './fckeditor/' ;
$oFCKeditor->Value = 'your comment here' ;
$oFCKeditor->Create() ;
?>


<!-- <textarea rows="7" cols="55" name="comment_text">   </textarea>   </p>       (Working fine with textarea)                          -->

<p>   <input type="submit" name="submit" value="Ajouter Commentaire" />   </p>

<input type="hidden" name="submitted" value="TRUE" /></p>

</form>

The field in the comment table where I want the text to be inserted is : comment_text

Please help me out,
Thanks.