Flash login opens new window on success

Alrighty, I’ve got a login script that works great with HTML/PHP/CSS. However I have a login now in a flash site, so I just pass the variables to my login.php and let the php scripts do their thing, but I am getting a conflict.

When the user presses ‘Submit’ I need the login destination page to open in a new window…and NOT in the flash movie. Any idea how I can do this? Thanks!