Teamspeak... Mouse Btn 4?

So my wow guild started using TS... the problem is that it doesnt support mouse button 4 on my mouse (logitech Mx518) and i can't use the mouse btn 3 because that's the auto run button in wow.

Is there anyway i can change some file manually to support it?

Nevermind... i decided to use the buttons that work and switch the wow auto run to the other mouse button.