error to load driver

I have finally compiled the driver source code and loaded it with command 
"modprobe -v at76c503-rfmd".

The "lsmod" command returns the following relevant infomation:

at76c503-rfmd     40332     0 (unused)
usbdfu                9324       0 [at76c503-rfmd]
at76c503            53888     0 [at76c503-rfmd]

If I am not mistaken, this is similar to the example provided in the README 
file. However, the "dmesg" command shows that the driver is not loaded.

Following the suggestion in the mailing archive, I tried to load driver with 
debug flag on.The first 2 commands are:

"insmod usbdfu.o debug=1"
"insmod at76c503.o debug=-1"

After entered the above 2 command, I got the following log info from 
"dmesg":

usbdfu.c: USB Device Firmware Upgrade (DFU) handler v0.11
usb.c: registered new driver usbdfu
at76c503.c: Generic Atmel at76c503/at76c505 routines v0.11

Then I entered the last command:

"insmod at76c503-rfmd.o"

Then I got the following log info from "dmesg":

usbdfn.c: registered new driver at 76c503-rfmd
usb.c: registered new driver at 76c503-rfmd
usbdfu.c: interface class is not DFU
at76c503.c: Downloading external firmware
at76c503.c: ext fw, size left = 15428, bsize=1024, i=0
at76c503.c: ext fw, size left = 14404, bsize=1024, i=1
at76c503.c: ext fw, size left = 13380, bsize=1024, i=2
at76c503.c: ext fw, size left = 12356, bsize=1024, i=3
at76c503.c: ext fw, size left = 11332, bsize=1024, i=4
at76c503.c: ext fw, size left = 10308, bsize=1024, i=5
at76c503.c: ext fw, size left =  9284, bsize=1024, i=6
at76c503.c: ext fw, size left =  8260, bsize=1024, i=7
at76c503.c: ext fw, size left =  7236, bsize=1024, i=8
at76c503.c: ext fw, size left =  6212, bsize=1024, i=9
at76c503.c: ext fw, size left =  5188, bsize=1024, i=10
at76c503.c: ext fw, size left =  4164, bsize=1024, i=11
at76c503.c: ext fw, size left =  3140, bsize=1024, i=12
at76c503.c: ext fw, size left =  2116, bsize=1024, i=13
at76c503.c: ext fw, size left =  1092, bsize=1024, i=14
at76c503.c: ext fw, size left =     68, bsize=1024, i=15
at76c503.c: getting firmware failed with 0, or version is 0
at76c503.c: this probably means that the ext. fw was not loaded correctly
unregister new device: device eth%d/c9e13000 never was registered
at76c503.c: at76c503_new_device returned NULL

Any help will be greatly appreciated.

Luke

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