so, is it your IP or your account that got blocked?
IP blocked may happen due to multiple log in failure such as putting wrong password or email. Usually you will be able to play again by waiting for 15 minutes or an hour or try to restart your router.
But if it is an account block, it may happen because your daughter account log in to the game from different computer with a different NIC and the system flag it as 'suspicious activity'. I believe RF4 have this algoritm to prevent stolen account or something like that.
I hope it helps a little