Usb mouse zaxis does not work

Hi, I want to implement switching between different camera modes. So first I need to
bind keys to different camera modes, then command server to do so.

The First steps is...

moveMap.bind( mouse0, zaxis, zoomCamera );
moveMap.bind(keyboard, f, zoomInCamera);
moveMap.bind(keyboard, g, zoomOutCamera);

above bindings does not call corresponding functions.
I want to switch to different camera modes and zoom in/out with 3th Person view.
But I couldn't have my moveMap bindings work, in ~/client/scripts/default.bind.cs file.

Thanks,

function zoomCamera(%val)
{
	Echo("Mouse zaxis %val=" SPC %val);
     $advCamera::Zoom = getMouseAdjustAmount(%val)*$cameraZoomSpeed;
}

function zoomInCamera(%val)
{
	Echo("Keyboard R %val=" SPC %val);
     //$advCamera::Zoom = getMouseAdjustAmount(%val)*$cameraZoomSpeed;
}

function zoomOutCamera(%val)
{
	Echo("Mouse F %val=" SPC %val);
     //$advCamera::Zoom = getMouseAdjustAmount(%val)*$cameraZoomSpeed;
}

moveMap.bind( mouse0, xaxis, rotateCameraHorizontal);
moveMap.bind( mouse0, yaxis, rotateCameraVertical );
//
// This command is not working for USB mouses
// Instead use  'r' and 'f' to zoom in and out
//
moveMap.bind( mouse0, zaxis, zoomCamera );
moveMap.bind(keyboard, f, zoomInCamera);
moveMap.bind(keyboard, g, zoomOutCamera);