krpano 1.20.9 - object pano - skin buttons doesn't work

hi,
ive generated an object pano by krpanotools.exe (config: object.config).
i've notice this issues:

1. button plugin "in" and "out" don't work
2. button arrows all don't work (when zoom in by mouseweel)
3. when fullscreen drag mouse rotation don' work

while all mouse events (clickdrag, zoom mouse weel) work correctly.

see this example
http://am.fondazionemariotobino.it/upload/Image/s…era/camera.html

can someone help me to fix these issues?
thanks all.
bye