Contact form help!

I followed this tutorial (http://www.flzone.net/ShowDetail.asp?NewsId=756).
The Contact form itself works fine as far as sending the email, HOWEVER, the script for the button doesn’t work exactly right. When one or more of the input boxes are not filled in, it’s s’posed to not move on. It’s s’posed to stop right there in frame one. I used the exact same script as then tutorial source, (the source works), but it goes ahead and skips to frame two and sends an email.
Here’s the script.

on (release) {
if (name eq “” or email eq “” or subject eq “” or message eq “”) {
stop();
} else {
loadVariablesNum(“form.php”, 0, “POST”);
gotoAndStop(2);
}
}