When playing Rift the game doesn't let me use alt key charactors, help?

[linkdude212]

When playing Rift the game doesn't allow me to use alt key charactors such as accented letters though it allows other players to use them. I'm using a logitech wireless keyboard which allows me to make alt key charactors in any other programme. example: é. Why is this and how can I fix it¿