Cannot lock user lib file /etc/ptmp or /etc/gtmp exist

I would get the message above when I try to manage users in Mandrake Control Center.
When I try the useradd command in console, i get the message : vipw lockfile (/etc/ptmp) is present
How to I prevent this?

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ecwConnect With a Mentor Commented:
If you're sure nobody else is editing /etc/passwd, you can safely remove /etc/ptmp
newindAuthor Commented:
Yes, I'm the only one using it.  But how do I prevent this?  I don't want to keep on deleting the file whenever I do User Management.
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