[RESOLVED KINDA] the dreadful SpaCe

okay i have this code... and it works fine. or so i thought...

PHP Code:

---

 case "remove_trainer": 
  if (is_array($_POST['rem_trainer'])) {
    foreach($_POST['rem_trainer'] as $trainer) {
        $trainer = addslashes($trainer); // use if magic quotes is disabled

        mysql_query("UPDATE members SET trainer = 0 WHERE username = '$trainer'") or die(mysql_error());

        echo "Removed trainer $trainer from list.<BR>";
    }
} 
 echo"<form action=index.php?console&OPT=remove_trainer method=post>
<table width=100%  border=0 cellspacing=0 cellpadding=0>
  <tr>
    <td scope=col>Remove Trainer(s): </td>
  </tr>
 ";
  $sql = "SELECT * FROM members WHERE trainer = 1";
  $result = mysql_query($sql) or die(mysql_error());
  while($row = mysql_fetch_array($result)) {
  echo" <tr>
    <td scope=col><input name=rem_trainer[] type=checkbox value=$row[username]>$row[username]</td>
  </tr>";
  }
 echo"
  <tr>
    <td scope=col><input type=submit name=removed value='Remove Trainer'></td>
  </tr>
</table>
 </form>"; 
 break; 


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the ONLY PROBLEM IS... it wont UPDATE anything with spaces in it...I tried replacing the (space) with the   and it didnt help...