External loadVariableNum location?

Hi,

I have the following actionscript in my flash file:

[AS]
loadVariablesNum(“http://www.mywebsite.com/form.php”, 0, “POST”);

// comment
[/AS]

Now, the flash files are on our clients server, but the PHP form is on our server because they cannot handle PHP scripts. So I am trying to call this page but it doesn’t seem to work. It only works when the hostname is the same as the webpage being viewed - it says something similar in flash help.

So, what can I do? How can I get it to read and send variable to a different server? Using Flash MX.

Cheers,
Chris