Need help on my new canon 320ex speedlight!!!

You should be more specific about what's going on, or maybe post an image with full exif data. Taking you literally, "come out black all the time" means you have a shutter or sensor (or lenscap) problem, as if there's any ambient light they shouldn't be totally black unless you're using a really fast shutter speed and small aperture.

What settings are you using (what mode... P? Green box? M? Av? Tv? something else? what aperture and shutter speed), and what kind of ambient light is present?  Does the camera work fine with no flash?  With the built in pop-up?