You can enable that via your CP. You go to your options and to the "Private Message" section. Check mark the box that says: "Show New Private Message Notification Pop-up" and that should do it ^^ sorry if that didn't help.
You can enable that via your CP. You go to your options and to the "Private Message" section. Check mark the box that says: "Show New Private Message Notification Pop-up" and that should do it ^^ sorry if that didn't help.