Flash Radio Form To PHP Shopping Cart

Right, What I am trying to do is send a value from a radio form in a piece of flash, to be received and processed by a different page (a PHP page, which is a shopping cart),

I have written the actionscript function to take the values from the radio form using formData.sendAndLoad to the PHP, problem is, I need this to also act as a getURL so that the PHP page opens as well, to display the shopping cart. However when I do this, Internet Explorer just wants to Download and save the PHP page the Flash is pointing to.

Any Ideas?