i can't flashing my nokia n9.

MXKEY [MxKey Team HTI Flasher Interface (WinUSB) 0], SN: C085E195
Using device: USB ROM and HTI, FW ver: 00.50, SN: 00010D83
Connection status: No device connected
Driver: nmwcdc, ver: 7.1.32.84
Module ver: 1.0.0.21724(14-05-2013), Library ver: 1.0.0.14397(09-05-2013)
Waiting for USB interface ...
Found device RM-696, hardware revision 1502
NOLO version 2.3.6
Version of 'sw-release': DFL61_HARMATTAN_40.2012.21-3.468.1_PR_468
Sending ape-algo image (7096 kB)...
Waiting for USB phonet ...
Verifying communication to device ...
Server application: 1.7.2
Found product: RM-696 rev. 1502
Server implements softupd protocol version 1.8
Image SW version DFL61_HARMATTAN_40.2012.21-3_PR_006
Image moslo not present
Image mmc not present
Image tar skipped
Image config skipped
Battery level 92 %, continuing.
[f] cert-sw [init 0 % 1 / 1 kB NA ]
Fetching error list:
========================================
bb5_rdc_cert_read failed
bb5_rdc_cert_read failed
bb5_rdc_cert_read failed
bb5_rdc_cert_read failed
bb5_rdc_cert_read failed
bb5_rdc_cert_read failed
Downgrade disallowed (1341828546)
[Pipe 0] Finishing in error state with status 10
========================================
Sleeping for 15 seconds while device boot up ...


any solution!!!
please help!!!