A few more site problems

hey im having trouble with my contact form on my site… its not working. im using php code to send the emails but it seems to not be working, if anyone could help me out it would be greatly apprecited!

<?php
$sendName= $_POST['sendName'];
$sendEmail= $_POST['sendEmail'];
$sendMessage= $_POST['sendMessage'];


$msg = "E-MAIL SENT FROM WWW SITE
";
$msg .= "Sender's Name:	$sendName
";
$msg .= "Sender's Email:   $sendEmail

";
$msg .= "Message:
";
$msg .= "$sendMessage

";

$to = "[email protected]";
$subject = "SITE FEEDBACK";
$mailheaders = "From: 2wo Designs
";
$mailheaders .= "Reply-To: $sendEmail

";

mail($to, $subject, $msg, $mailheaders); 

?>

heres the forms actionscript which is on its own layer:
[AS]submit_btn.onPress = function(){
laodVariablesNum(“send.php”, “0”, “POST”);
nextFrame();
}[/AS]