error log

[cittaragusa]

Can someone help me to fix following errors that I find in huge quantity on the error log of my server?

[Mon Oct 22 10:39:25 2007] [error] [client 62.123.49.16] PHP Warning: copy(/home/6816222589/www/web/Chat/src/../data/public/themes/default/style.css.php): failed to open stream: Permission denied in /home/6816222589/www/web/Chat/src/pfctools.php on line 179, referer: http://www.cittaragusa.it/Chat/Index.php

[Mon Oct 22 10:39:25 2007] [error] [client 62.123.49.16] PHP Warning: chmod(): Operation not permitted in /home/6816222589/www/web/Chat/src/pfctools.php on line 180, referer: http://www.cittaragusa.it/Chat/Index.php

thanks