She is most likely using a router and the ports required by aim to establish a direct connection are being blocked by that router.
The solution would be to find the ports required for the direct connection then goto the router control panel: (
http://192.168.1.1) <enter password> and find the forwarding option and forward those ports to the address the router assigned to her system.
(To find her router assigned address: start > run > command or cmd > ipconfig | It will be the 192.168.1.x number that shows up)
If she doesn't have a router, then whoops .. this post may help someone else in the future while they are employing the ever helpful search feature.:bandit: