PS/2 mouse in Op. Wolf does not work

I am trying to use the mouse in Operation Wolf but when I start the game, mouse movement is not working 100%. It moves the aim and I can fire bullets, but i can not properly move the aim around on the screen.

I have the same problem with Advanced Art Studio.

Anyone here have some experience with using the connected PS/2 mouse to work with c64 games like Operation Wolf (or programs like Adv. Art Studio) ?

UPDATE: And when I say that it "does not work" in Op Wolf, what happens is that when I physically move the mouse, the aim just moves in one direction until it ends up in the lower right hand corner. The left mouse button (fire) works fine.

I was hoping to play Op Wolf with mouse as I have been dreaming of that since the 90's

(Ps! the mouse works fine as I use it on the minimig core daily)

Thanks for the tip - I will source different versions to test.

Quote from el_pasi

Hi! Nostalgia-crack of Operation Wolf USA works with ps2-mouse. You have to choose from games menu cbm mouse, not neos.

Aha, sweet! Thank you for the info. Looking forward to finally play this game on the c64 It is not so easy with joystick.