Controls not operable with mouse

[RBendo]

Hi, sorry for bad english.
I modified the position of the cab of an italian engine, manipulating the section sourceltoptransform of the corresponding geopcdx files.
Specifically I had to build a hierarchy by placing all of the cabin components as children of a single component called "cabmain", after that i move back the cabin by modifying the Z of this element.
It worked well, but there's a problem, some controls (brake and reverse, plus a few buttons) are no operable with the mouse. Small detail, moving the cab camera near the hud, some controls are reactivated, not all. can be a problem of coordinates? Anyone have any ideas?