error on loading the module



hi
i compiled the device driver program bfin_adv7393fb.c and the .ko
and .o files are generated.after that while loading the module using
insmod "bfin_adv7393fb.ko" it gives the following errors:::::::

insmod: error inserting "bfin_adv7393fb.ko"-1 invalid module format

help me to solve this........

.