重新编译USB模块的问题

我看了些资料，说linux下不支持的USB设备只需将该设备的Vendor,ProdID等信息加到unusual.h文件中，再重新编译usb-storage.o模块即可。但是我做的过程中出了点问题（老问题：版本问题）：
#modprobe usb-storage
/lib/modules/2.4.20-8/kernel/drivers/usb/storage/usb-storage.o:kernel-module version mismatch
/lib/modules/2.4.20-8/kernel/drivers/usb/storage/usb-storage.o was compiled for kernel version 2.4.20-8custom while this kernel is version 2.4.20-8
/lib/modules/2.4.20-8/kernel/drivers/usb/storage/usb-storage.o:insmod /lib/modules/2.4.20-8/kernel/drivers/usb/storage/usb-storage.o failed
/lib/modules/2.4.20-8/kernel/drivers/usb/storage/usb-storage.o:insmod usb-storage failed