Belkin f5d6050 and channel 14

I am trying to get a Belkin f5d6050 USB adapter to work on channel 14.  
The problem is that the driver IDs it as a US model, and only allows it 
to go to channel 11.

I tried changing the FCC channel definition to match that of Japan, 
(0x3fff) but the adapter then won't come up at all.

I get a message repeated every second or so:

join_bss completed with 3

and iwconfig shows that it has failed to associate with the access point.

How does the driver determine the reg_domain?  Is this something pulled 
from the driver USB info?  MAC address?  How can I get this adapter to 
work with the channels I need?

I'm guessing it has something to do with the firmware being loaded....  
Is that right?

Thanks,

--Yan