Parse error: syntax error, unexpected T_ELSE

Hi, i have this script wich basically connects to a database and delete a
record according to the Id parameter given. The problem is that when i test
it i get this error:

*Parse error*: syntax error, unexpected T_ELSE in *
/var/www/biblio/scripts/delete.php* on line *31

This is the script:

*<?php
/*
   deletescore.php:  deletes record for passed id from highscores table and
                     returns status to Flash
*/
// fill with correct data for your server configuration
$server = "localhost";
$username = "root";
$password = "itsveryeasy";
$database = "biblioteca";

//connect to database added by calm
mysql_connect($server, $username, $password);

if (!mysql_connect($server, $username, $password)) {
   $r_string = '&errorcode=1&';

} elseif (!mysql_select_db($database)) {
   $r_string = '&errorcode=2&';

} else {

      $del_str = "DELETE FROM libros WHERE bnumero=".$_GET['Id'];

      if (!mysql_query ($del_str)) {
         $msg = mysql_error();
         $r_string = '&errorcode=3&msg='.$msg;
      } else {
         $r_string = '&errorcode=0&';
      }
   } else {
      $r_string = '&errorcode=4&';

}

echo $r_string;
?>

Wha am i doing wrong??

Thanks.

Javier