Dear Gurus, Mr. Carlson asked:" Is the card the "CBFW1" model? I think there is a "CBFW2" model which is for the mac. I have the "1" model and finally gave up on it. It's for peecees. You didn't mention if you have the Ratoc drivers installed as well." Mine is a CBFW2 with the Ratoc driver' installed. I even went to their site and updated my drivers. I bought a second CBFW2 thinking that might be the problem. Nope. Donald McCaig Yucatec Farm Williamsville, Virginia 24487 USA