Permissions Error: VGML file not readable: /web/mvgazette/sites/default/files/mvgazette_archive/GO/VGML/2011/12/16/webwn_tisburyboat.vgml

Array
(
    [type] => 2
    [message] => chmod(): Operation not permitted
    [file] => /usr/local/www/dave/sites/all/modules/custom/mvgazette_archive_import/includes/parse_vgml.inc.php
    [line] => 22
)

Could not change file permissions