To irneb and dgorsman
No, I didn't have to install a driver.
In fact, the mouse was part of a microsoft keyboard+mouse set (usb).
But I was not using the keyboard, only the mouse.
As I mentioned, they both work fine with all other software I have.
The mousewheel also works as expected in the drawing editor.
The only problem was the editor windows in the lips ide.
Never mind, case solved.