two different servers problem

ok - this should be easy, but this is me here. here goes - i've built a site in flash on a server that can't handle forms, so i want it to call a mail.php script on another server, like this:

loadVariables ("http://www.theartuary.com/mail.php", "0", "POST");

right?

my script is:

mail("glennn@theartuary.com", "Mailbox Club Enrollment", "Name: $Name
Age: $Age
Street: $Street
City: $City
State: $State
Zip: $Zip", "From: $MailFrom");

right? well, if i put the form on the same server, or run it from my local pc, then it works, it sends mail. but when i put it on the Bad Server, then no mail. i can't understand it.

can someone tell me what i need to learn here? little help?

thanks,
glennn