the above error came up when i tried to crack my syskey in winxp sp3

these are the commands i issued


root@bt:~# mount /dev/sda1 /mnt/sda1
root@bt:~# bkhive /mnt/sda1/WINDOWS/system32/config/system key
root@bt:~# samdump2 /mnt/sda1/WINDOWS/system32/config/SAM key
Error reading ControlSet: _RegOpenKey

this error comes up..... can any one tell me wats wrong??????