Flash sometimes has problems with POST. The way I got it to work recently is by using sendAndLoad(url.php, loadVarsObjectToReceiveVars, “POST”)
Also, you may have to declare header info like this also:
$extras .= “MIME-Version: 1.0
”;
$extras .= “Content-type: text/html; charset=iso-8859-1
”;
Show us your flash code too, it maybe a problem there.
–EP