Fatal error: Call to undefined function wp_install()

Attempting to install, I get the following error message:

Fatal error: Call to undefined function wp_install() in /home/a6587871/public_html/wordpress/wp-admin/install.php on line 215

I’ve verified that my wpconfig is correct, and have also tried re-uploading the wordpress files several times using Filezilla (As per recommendation on this thread: http://wordpress.org/support/topic/cannot-install-wp-fatal-error-call-to-undefined-function-wp_install?replies=5)

Still no luck after re-uploading and retrying the installation several times. I am hosting on 000host and am installing manually (Not Fantastico)

The code causing the crash is:

if ( $error === false ) {
$wpdb->show_errors();
$result = wp_install($weblog_title, $user_name, $admin_email, $public, ”, $admin_password);
extract( $result, EXTR_SKIP );
?>

in the install.php file.

Any ideas?