Updating Page Error

[Kevin]

Could still be part of the permissions issue I am having, but every time I try to update a page I get the following error:

Warning: copy(../../backups/pages/index.bak.xml) [function.copy]: failed to open stream: Permission denied in /home/yousrcom/public_html/guitaruser.com/admin/inc/changedata.php on line 90

Warning: Cannot modify header information - headers already sent by (output started at /home/yousrcom/public_html/guitaruser.com/admin/inc/changedata.php:90) in /home/yousrcom/public_html/guitaruser.com/admin/inc/changedata.php on line 119