This is driving me nuts

my wireless remote keyboard has a touchpad, it is not however, treated as such, because the keyboard simply treats it as a mouse, and as far as the PC is concerned its a mouse. Synaptic settings are not even available. Anyway, whenever I slide my finger over the "scroll area" the keyboard sends a "mouse wheel" signal to the PC and my desktops swap (usually several times). For the life of me I cannot find a setting to disable mouse wheel desktop change. I'm sure its there, maybe someone can tell me where?
Standard KDE install with 3D cube (6 desktops) enabled.
Pete