Installation problems

[hotirish]

After many hours I've finally got as far as installing the Sitebuilder database, but now I'm getting the following error:

Warning: copy(/usr/local/sitebuilder/htdocs/install.bkp/install_action.php): failed to open stream: No such file or directory in /usr/local/sitebuilder/include/classes/class.util.inc on line 46

Warning: copy(/usr/local/sitebuilder/htdocs/install.bkp/install.php): failed to open stream: No such file or directory in /usr/local/sitebuilder/include/classes/class.util.inc on line 46

Warning: copy(/usr/local/sitebuilder/htdocs/install.bkp/error_log): failed to open stream: No such file or directory in /usr/local/sitebuilder/include/classes/class.util.inc on line 46

Warning: Cannot modify header information - headers already sent by (output started at /usr/local/sitebuilder/include/classes/class.util.inc:46) in /usr/local/sitebuilder/htdocs/install/install_action.php on line 364

Anybody know what could be causing this?

Thanks in advance.