I agree with Jango_Fett. I have the same problem with '~' and my keyboard is foreign. I'm pretty sure that's the problem here.
My friend tried it and it works for a minute untill FH crashes...
Yup, that would be because It's a foreign keyboard. You probably have foreign letters where these marks are on American keyboard.
I'm pretty sure you can't really fix that tho. Even if you switch languages.