how to insert module in mini2440 board kernel module

rahul s
Hi,
   I develop kernel module from c code given in mini2440 kernel/driver/char
folder. I got .ko file for that kernel program in host pc system.
   Also I create object file for user space application.
   Both of them I transfer to mini2440 board through serial port.
   But when I give insmod command or modprobe command for .ko file (kernel
module) it gives error "could not find kernel module".
   I use mknod command for creating special char device in host pc, but I
wan'nt able to transfer it mini2440 board.
   Also I don't know where & when I use mknod command?
   Please explain me the procedure of inserting kernel module and execution
of the program.
Thanking in advance,
Rahul.