Why doesn't PHP mailing work for me? :(

Serious help for a simple problem. Been at this for a long time, it simply doesn’t work!

I’ve simplified the problem completely, this is the php file (taken from php.net - only changed the email it is being sent to):

=============================================
<?php
$to = ‘tariqayubi@hotmail.com’;
$subject = ‘the subject’;
$message = ‘hello’;
$headers = ‘From: webmaster@example.com’ . "
" .
‘Reply-To: webmaster@example.com’ . "
" .
‘X-Mailer: PHP/’ . phpversion();

mail($to, $subject, $message, $headers);
?>

Firstly I wanted to send a mail from a flash file, but that didn’t work, so i just went down to this very low level script.

I’m using StreamlineNet as my host which does support PHP (i’ve used a few other hosts too).

I would appreciate ANY help

THANKS.