commit cannot Lock issue

Hi
A developer created a file say typedef.Image, then removed it
and recreated a new file with different case Typedef.Image
and when he try to commit this new file he gets an error like

cvs server: cannot lock `path to filename/Attic/Typedef.Image,v'

Since this is a new file there is no admin lock on this file.
I have tried removing this from cvs and re-adding/commiting.
But we Hit the above error repeatedly.

Has someone faced this Error before?
Any help will be greatly appreciated.

OS:Linux xxxxxxxxxxxxxx.com 2.4.21-27.0.1.ELsmp #1 SMP Mon Dec 20 18:47:45
EST 2004 i686 i686 i386 GNU/Linux
CVS Info

$cvs --version
Concurrent Versions System (CVS) 1.11.2 (client/server)
Copyright (c) 1989-2001 Brian Berliner, david d `zoo' zuhn,
                        Jeff Polk, and other authors
CVS may be copied only under the terms of the GNU General Public License,
a copy of which can be found with the CVS distribution kit.
Specify the --help option for further information about CVS
thanks in advance
Raj