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chntpw segmentation fault

Why would i receive a segmentation fault while running chntpw?

I'm helping someone remote reset their windows password.  

O/S backtrack3 live cd
location of sam file - /mnt/sda/sda1/windows/system32/config/SAM
location of chntpw - /pentest/password/chntpw/chntpw*

They keep receiving a "segmentation fault" error while running chntpw

Any ideas?  i told them to reboot twice cleanly, then shut down and boot backtrack3 and try again... still waiting to hear back

What they have done.
1. booted in to backtrack3
# cd /mnt/sda/sda1/windows/system32/config 
# /pentest/password/chntpw/chntpw -u Administrator SAM
# /pentest/password/chntpw/chntpw -i

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2 Solutions
I Have never used backtrack but Ive used Offline Password & Registry reader a couple of times with no problems. - http://home.eunet.no/pnordahl/ntpasswd/ 
A segmentation fault involves a program trying to access a protected area of main memory. It's a program fault and can't be resolved by anyone but the programmer. They should update the faulty piece of software
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