Hey Cheryl,
The best thing would be to update to CompojoomComment and let joomlacomment rest in peace
Anyway, the other good thing to do would be to update at least to 4.0 . If you don't wish to update to 4.0, then search for this in admin.comment.php
if ( !( $acl->acl_check('administration', 'config', 'users', $user->usertype) )
|| $acl->acl_check('administration', 'edit', 'users', $user->usertype, 'components', 'com_comment') ) {
global $mainframe;
$mainframe->redirect( 'index2.php', _NOT_AUTH );
}
You can delete and all of your backend users should be able to access the component then.
Cheers,
Daniel
P.S. It is not really clever to run that outdated software there - it can contain all kind of security holes that the bad boys on internet will be happy to exploit!