Someone mentioned their CV64/3D working in an A3000. Hell... mine works just fine in my A2000! I had terrible luck using the Cybergrafx software (even 4.xx) and the only way I could get it to work was by using the latest P96 drivers. 2.x... the one that, during installation asks to donate $20 or 20DM. OLDER versions of P96 did NOT work.
Try installing that and see if your luck changes...
http://aminet.net/package/driver/video/Picasso96...and yes, you need to totally delete and uninstall ANY previous video drivers before installing this.