Everytime I try to download a new theme I keep getting the following error: Warning: chmod() [function.chmod]: No such file or directory in /home/andrew6/public_html/concrete/helpers/file.php on line 80

Warning: copy(/home/andrew6/public_html/packages/theme_pluralism/themes/pluralism/images/img09.gif) [function.copy]: failed to open stream: No such file or directory in /home/andrew6/public_html/concrete/helpers/file.php on line 79

Can anyone help?