yesterday i bought a USB 2.0 cardbus(brand: Billionton) and installed the driver for OS X provided but my Powerbook cannot recognised the card. i downloaded thelastest version of driver but to no avail again. What should i do? i have tested the same card on Fujitsu notebook it work fine except that it cannot recognised my Imation Superdisk drive. But for my Powerbook, it can't even recognised the external flopply at all. Your advice is really appreciated!