thanks bro check this please help
C:\Program Files\Nokia\Flasher>flasher -f -F rootfs.bin
flasher 3.12.1 (Oct 6 2011) Harmattan
WARNING: This tool is intended for professional use only. Using it may r
in permanently damaging your device or losing the warranty.

Ping attempt 1 (250 ms)
Server application: 1.5.26
Found product RM-696 rev. 1603
Server implements softupd protocol version 1.8
Image SW version DFL61_HARMATTAN_40.2012.21-3_PR_001
Image moslo not present
Image mmc not present
Image tar skipped
Image config skipped

Battery level 33 %, continuing.

image [state progress transfer flash speed]
---------------------------------------------------------------------
[x] cert-sw [finished 100 % 1 / 1 kB NA ]
[ ] cmt-2nd [pending 0 % 0 / 0 kB NA ]
[ ] cmt-algo [pending 0 % 0 / 0 kB NA ]
[ ] cmt-mcusw [pending 0 % 0 / 0 kB NA ]
[x] xloader [finished 100 % 23 / 23 kB NA ]
[x] secondary [finished 100 % 94 / 94 kB NA ]
[ ] kernel [pending 0 % 0 / 0 kB NA ]
[ ] rootfs [pending 0 % 0 / 0 kB NA ]
ERROR: SU_GET_UPDATE_STATUS_REQ terminated with error code 1: Unknown er

image [state progress transfer flash speed]
---------------------------------------------------------------------
[x] cert-sw [finished 100 % 1 / 1 kB NA ]
[x] cmt-2nd [finished 100 % 95 / 95 kB NA ]
[x] cmt-algo [finished 100 % 789 / 789 kB NA ]
[x] cmt-mcusw [finished 100 % 6050 / 6050 kB 3240 kB/s]
[x] xloader [finished 100 % 23 / 23 kB NA ]
[x] secondary [finished 100 % 94 / 94 kB NA ]
[x] kernel [finished 100 % 2714 / 2714 kB 2801 kB/s]
[f] rootfs [pending 0 % 0 / 1170282 kB NA ]
Fetching error list:
========================================
Update content failed to verify against cert: SW certificate not updated
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
mmc: sfdisk returned status 1
mmc: Could not exec 'tune2fs -L rootfs /tmp/sudmmct1uHMw/internal0p2'
mmc: Could not remove mount directory /tmp/sudmmct1uHMw/mnt: No such fil
ectory
[Pipe 5] Finishing in error state with status 1
========================================

ERROR: Failed to flash images