USB-ohci

I am trying to put a pcmcia card into my laptop that will act as a virtual modem for cdpd access. After inserting the card and checking for ohci support in the kernel i modprobe the usberial ttyusb0 and then dmesg and get the following: PCI: Setting latency timer of device 02:00.0 to 64 usb-ohci.c: USB OHCI at membase 0xe0a00000, IRQ 11 usb-ohci.c: usb-02:00.0, PCI device 11c1:5802 usb.c: new USB bus registered, assigned bus number 5 hub.c: USB hub found hub.c: 2 ports detected hub.c: new USB device 02:00.0-1, assigned address 2 usb.c: USB device 2 (vend/prod 0xf3d/0x110) is not claimed by any active driver. Why cant it be claimed by a driver??????