I'm trying to flash my N900 with no luck. I've tried to flash with:
flasher-3.5 -F RX-51_2009SE_20.2010.36-2.002_PR_COMBINED_002_ARM.bin -f, while holding the u and plugging in.
I also tried to cold flash with
flasher-3.5 -c -h RX-51:2201 -S usb -F RX-51_2009SE_20.2010.36-2.002_PR_COMBINED_002_ARM.bin -f but received the same errors listed here:

<snip>
flashing cmt-mcusw... Sending request 0x50 failed!

Bootloader error log follows:
ERROR: Invalid argument for 'cmt'
ERROR: Error processing request, stalling
ERROR: EP0 STALL sent
ERRO CMT 2nd didn't wake up
ERROR: Error processing request, stalling
ERROR: EP0 STALL sent
ERROR: Premature end of control transfer

I have noticed in the Settings -> General -> About product the version info is <unknown>. Any ideas, to force a flash. Or Is it possible to reformat and start fresh.