Reply to VCI-100 Macbook Pro

My Macbook Pro is not recognizing my VCI-100SE. I Tried different usb cables and different USB hubs and still nothing. I put a flash drive in the same port and MacBook pro recognized the flash drive. Im using Mac OS X 10.6.4 Snow leopard 2.4 Ghz Intel core 2 Duo 4Gb of ram. I just switched from a PC and it worked fine. Please help