重新编译usb-storage.o模块支持CF卡的问题

我在REDHAT9.0用读卡器接USB口，读卡器接SD卡时能正常工作，接CF卡时就出现问题：
插入设备出现下面的信息：
EXT3 FS 2.4-0.9.19, 19 August 2002 on ide0(3,9), internal journal
Adding Swap: 2963952k swap-space (priority -1)
SCSI subsystem driver Revision: 1.00
Initializing USB Mass Storage driver...
usb.c: registered new driver usb-storage
scsi0 : SCSI emulation for USB Mass Storage devices
usb-uhci.c: interrupt, status 3, frame# 2005
Vendor: Generic Model: USB SD Reader Rev: 1.00
Type: Direct-Access ANSI SCSI revision: 02
WARNING: USB Mass Storage data integrity not assured
USB Mass Storage device found at 2
USB Mass Storage support registered.

我把设备的厂商名，产品ID等信息加到unusual.h中，重新编译模块后还是不行啊，各位DX，救救我啊！