Which revision of daughter card do you have?
Which revision of buster do you have?
CV64 cards work fine with Rev 7.01 and later of the Daughter Card and most busters.
*HOWEVER*
You must set the JP1 jumper on the CV64 card to the correct setting for your buster chip.
http://www.amiga-hardware.com/showhardware.cgi?HARDID=463If you have a CV64/3D card then I'd have to do some more research for you.