Using flash 8 and php for sending mail

hello, i managed to send the variables with :

loadVariablesNum("mailTut.php", 0, "POST");

but i want to put all the fields and the button into a movieclip , and when i do that it doesnt work. i tried to add the name of the mc like this:

form.loadVariablesNum("mailTut.php", 0, "POST");

but it dosnt work. and i dont have anymore ideas…