Httpd wont start in direct admin and gives the error

While trying to start httpd in direct admin giving the following error:

# /etc/init.d/httpd start

[wpfmb type=’error’ theme=2]Starting httpd: Syntax error on line 30 of /usr/local/directadmin/data/users/clickalist/httpd.conf:Invalid command ‘php_admin_flag’, perhaps misspelled or defined by a module not included in the server configuration[/wpfmb]
To resolve this error follow the steps below:

./build update

Backup any file named /usr/local/directadmin/custombuild/ .custombuild.

/build rewrite_confs

After that Apache will be started up.