Blockland supports MOUSE1-4. What it needs is MOUSE5. My mouse has left click (MOUSE1), right click (MOUSE2), scroll wheel click (MOUSE3), click scroll wheel left (MOUSE4), and click scroll wheel right (which Blockland also calls MOUSE4). I was hoping Badspot could add support for MOUSE5 so Mod Manager might use it. Clicking the scroll wheel left and right is set up to do page back and forward for this type of mouse, and it only doesn't seem to work with Mod Manager since it isn't standard. :(