[cvsnt] Failed to obtain lock

[nur]

is this a bug? if so which version should i use to get rid of this
problem? and where can i download old versions from? thanks a lot

D:\project\deneme>cvs release  -d sp8
Are you sure you want to release (and delete) directory `sp8': y
cvs [release aborted]: Failed to obtain lock on /.directory_history,v: FAIL Lock
 not within repository

D:\project>cvs version
Concurrent Versions System (CVSNT) 2.0.58d (client/server)

on windows xp