Edit: Less shotgun.
Try running openarena in a console -- you should see some debug messages appear; we should be better able to help you then.
(Perhaps you don't have OpenAL or proper permissions, or OpenGL not configured? What hardware are you running on?)
i can't see anything because it crashes in an instant, and sends me automatically to login screen, it doesn't return me to desktop.
What graphics card do you have?
How have you installed the drivers for it?
ati 9600 pro, i have proprietary drivers, installed from the repository.