I'm running PC-BSD 8.0 operating system at work which use KDE 4.3.5 and thus Qt.

I have an application (developed in java, but not Qt related) that requires me to press-hold ctrl+shift+alt in certain situations and then the click the right mouse button. But it doesn't work. I tried to see if the combination worked in "global keyboard shortcuts" in the system settings of KDE. When I try to set a custom combination for any of the action and press these three modifier keys at the same time I get (instantaneously) a popup warning window saying:
"The key you just pressed is not supported by Qt."
Is that true? That is is impossible to get it to work (short of implementing it in the Qt toolkit if it really is not supported)?
If it is supported but Qt in general, anyone have an idea where I should start digging, perhaps PC-BSD <--> KDE issue?

I have a few colleagues thinking I should run Gnome (and thus GTK+, they use Ubuntu Linux)... Can anyone save me?