How do I use alphanumeric characters in CSS?

So I’m having quite a problem here, and I hope someone can tell me that it’s very simple to solve…

i am using some css and xml in combination with flash mx, and everything works ok, except for the alphanumeric characters (e with dots on it and stuff like that) And i can’t seem to figure out how to get this to work…

Read something about entities, but that’s absolute a strange language for me…

Bart-c