Unable to back up database or upgrade concrete 5

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Hello, I am unable to update concrete 5 or backup my database. I receiving the following error and am not sure what to do?
Thank you



Warning: include(/home/newcenturymontessori/newcenturymontessoriacademy.com/concrete/single_pages/dashboard/system/backup_restore/update.php)


[function.include]: failed to open stream: No such file or directory in /home/newcenturymontessori/newcenturymontessoriacademy.com/concrete/core/libraries/view.php on line 905

Warning: include() [function.include]: Failed opening '/home/newcenturymontessori/newcenturymontessoriacademy.com/concrete/single_pages/dashboard/system/backup_restore/update.php' for inclusion (include_path='/home/newcenturymontessori/newcenturymontessoriacademy.com/libraries/3rdparty:/home/newcenturymontessori/newcenturymontessoriacademy.com/concrete/libraries/3rdparty:.:/usr/local/lib/php:/usr/local/php5/lib/pear') in /home/newcenturymontessori/newcenturymontessoriacademy.com/concrete/core/libraries/view.php on line 905