HELP HELP HELP !

I have just received a Phantom 2, with a Zenmuse H3-3D Gimbal.  I have followed the installation process to install it correctly.  Only problem, when I power up the Phanto, it wobbles around and then points nose down about 60 degrees.  I can use to tilt lever on the controller to tilt the gopro hero 3 up and down slightly, but it centralises about 60 degrees nose down.

I do not know what to do !  I also don't know how to connect it to my computer to update the settings etc.

Is my Gimbal broke ?

This is a duplicate question --  I answered the first version.