problema cancellazione invio richiesta di amicizia

[ciberp]

Salve a tutti, non so cosa dire ora ho fatto la parte per cancellare la richiesta di amicizia inviata solo che non funziona ho fatto cosi:

<?php 
include 'connett.php'; 
include 'functions.php'; 
include 'header.php'; 
?> 
<div class="container"> 
<?php 
if(isset($_GET['user']) && !empty($_GET['user'])){ 
$user=$_GET['user']; 
} else { 
$user=$_SESSION['user_id']; 
} 
$my_id=$_SESSION['user_id']; 
$username=getuser($user, 'username'); 
?> 
<h3><?php echo $username; ?></h3> 
<?php if($user != $my_id){ 
$check_frmd_query=mysql_query("SELECT id FROM frnds WHERE (user_one='$my_id' AND user_two='$user' OR (user_one='$user' AND user_two='$my_id'))"); if(mysql_num_rows($check_frmd_query) == 1){ 
echo "[url='#']Already Freand[/url] | [url='#']Onfriend $username[/url]"; 
} else { 
echo $from_query=mysql_query("SELECT id FROM frnd_req WHERE frnd_req.from='$my_id' AND frnd_req.to='$user'"); 
$to_query=mysql_query("SELECT id FROM frnd_req WHERE frnd_req.from='$user' AND frnd_req.to='$my_id'"); 
if(mysql_num_rows($from_query) == 1){ 
echo "[url='actions.php?action=cancel&user=$user']Cancel Request[/url]"; 
} else if (mysql_num_rows($to_query) == 1){ 
echo "[url='#']Ignore[/url] | [url='#']Accett[/url]"; 
} else { 
echo "[url='actions.php?action=send&user=$user']Send Friend Request[/url]"; } 
} 
} 
?> 
</div>

ho praticamente aggiunto questa riga:

echo "[url='actions.php?action=cancel&user=$user']Cancel Request[/url]"; 

e poi alla pagina action.php dove deve eseguire la query ho messo cosi:

<?php 
include 'connett.php'; 
include 'functions.php'; 
session_start(); 
$action=$_GET['action']; 
$user=$_GET['user']; 
$my_id=$_SESSION['user_id']; 
if($action == 'send'){ 
mysql_query("INSERT INTO frnd_req VALUES('','$my_id','$user')"); 
} 
if($action == 'cancel'){ 
mysql_query("DELETE FROM frnd_req WHERE from='$my_id' AND to='$user'"); 
} 
header('location: profile.php?user='.$user); 
?>

perchè non cancella?, qualcuno puo aiutarmi?, ciao