不同计算机上的Actionscript 2中的LoadVars.sendAndLoad问题

I'm writing a very simple flash app (AS 2) to sign users up to an email newsletter; the way it works is that it uses LoadVars to hit a (same-domain) PHP script via POST with the user's email address. The PHP script then passes the info through to another domain (the newsletter mailer URL) via curl to sign up the user.I'm writing a very simple flash app (AS 2) to s