I get very low FPS Playing world of warcraft 3-9 FPS

Are you serious? Do you really expect us to try and help you with that severe lack of detail?

Why don't you start with your computer configuration and then tell us what you have done so far. We aren't mind readers.
 
my guess, it's one of few problems
1.) you are playing on an old machine (aka s478 P4 with AGP)
2.) you bought a new computer with a 9400/9500GT GPU (or similar GT1XX or GTS2xx series)
3.) you don't have a good internet connection
4.) you are downloading a *** ton while playing

though more specs would be nice