[PHP][MySQL]Formularz edycji Opcje

[R0ckY]

Mam oto taki formularz

[PHP] pobierz, plaintext 
<?php
 
include "cf.php";
 
if(isset($_POST['update']))
{
        $nick = $_POST['nick'];
        $pass = $_POST['pass']=$_POST['pass2'];
        $email = $_POST['email'];
        $gg = $_POST['gg'];
        $siec = $_POST['siec'];
        $strona = $_POST['strona'];
 
        if(empty($nick) || empty($pass) || empty($email)) echo '<bWpisz wszystkie pola!</b>';
        else
        {
                $nick = trim(strip_tags( mysql_real_escape_string(HTMLSpecialChars($nick))));
                $pass = trim(strip_tags( mysql_real_escape_string(HTMLSpecialChars($pass))));
                $pass2 = trim(strip_tags( mysql_real_escape_string(HTMLSpecialChars($pass2))));
                $email = trim(strip_tags( mysql_real_escape_string(HTMLSpecialChars($email))));
                $gg = trim(strip_tags( mysql_real_escape_string(HTMLSpecialChars($gg))));
                $strona = trim(strip_tags( mysql_real_escape_string(HTMLSpecialChars($strona))));
                $siec = trim(strip_tags( mysql_real_escape_string(HTMLSpecialChars($siec))));
 
                if(mysql_num_rows($result)!=0) echo '<b>error!</b>';
                {
                        $pass = md5($pass);
                        $pass2 = md5($pass2);
 
                        $query = "UPDATE users SET nick='$nick', pass='$pass', email='$email', gg='$gg', strona='$strona', siec='$siec' WHERE id = '$_SESSION[id]' )";
                        echo $query;
                        if(mysql_query($query)) echo 'Zmieniono poprawnie';
                }
        }
}
echo '<br><br>
<center>
<form action="index.php?go=dane" method="POST">
<table width="450" class="euro_table_rej">
 <tr>
  <td colspan="4"><h2>Edycja profilu</h2></td>
 </tr>
 <tr>
  <td>Login:</td>
  <td><input type="text" name="nick" class="euro_regis" value="'.$_SESSION['nick'].'"></td>
 </tr>
 <tr>
  <td>Hasło:</td>
  <td><input type="password" name="pass" class="euro_regis" value="'.$_SESSION['pass'].'"></td>
 </tr>
 <tr>
  <td>Powtórz hasło:</td>
  <td><input type="password" name="pass2" class="euro_regis" value="'.$_SESSION['pass2'].'"></td>
 </tr>
 <tr>
  <td>E-mail:</td>
  <td><input type="email" name="email" class="euro_regis" value="'.$_SESSION['email'].'"></td>
 </tr>
 <tr>
  <td>Gadu-Gadu:</td>
  <td><input type="text" name="gg" class="euro_regis" value="'.$_SESSION['gg'].'"></td>
 </tr>
 <tr>
 <td>Sieć CS:</td>
  <td><input type="text" name="siec" class="euro_regis" value="'.$_SESSION['siec'].'"></td>
 </tr>
 <tr>
 <td>WWW:</td>
  <td><input type="text" name="strona" class="euro_regis" value="'.$_SESSION['strona'].'"></td>
 </tr>
 <tr>
  <td><br><br><input type="submit" name="update" value="Aktualziuj"></td>
 </tr>
</table>
</form>
</center>
';
mysql_close();
?>
[PHP] pobierz, plaintext 

Chce nim edytować mysql niestety wywala błąd

Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in dane.php on line 25
UPDATE users SET nick='R0ckY', pass='6572bdaff799084b973320f43f09b363', email='lukaszzbydlina@interia.pl', gg='', strona='', siec='' WHERE id = '25' )

Jestem zielony w sprawach php :/