Login form in Flash

I have a simple login form in Flash for a website. All users login using the same password. The current actionscript which I am using is as follows.

on (keyPress “<Enter>”) {

if (_root.txtPass.text == "agentx") {
    
    gotoAndPlay("Scene 3", 1);
}

}

however it is very easy to extract the password by decompiling the swf.
Can you suggest me an alternative? Can somebody direct me to a Flash - PHP (but no Sql) validation tutorial?

Thanks…