ifcfg-vpn0 script disappears from /etc/sysconfig/network-scripts

[Bret Hughes <bhughes elevating com>]

Using gordon's vpn setup with great sucess but I am having
one problem that I ca't figure out.  Every now and then when
I start the interface from my laptop  (ifup vpn0). I get a
usage message from ifup that indicates the ifcfg-vpn0 is not
there.  I go look and sure enough, it is not.  I have not
been able to replicate it at will and was wondering if there
is a security feature anywhere that removes files from this
directory that are not supposed to be there?   Linuxconf
maybe?  I have trouble believing this but I am at my wits
end.  The other scripts ifup-vpn and ifdown-vpn are
unaffected.

Any ideas?

Bret