Im getting this
Warning: shell_exec(): Cannot execute using backquotes in Safe Mode in /usr/local/directadmin/plugins/custombuild/admin/elements/menu.php on line 1
You must have a customized configuration file for PHP with --enable-safe-mode flag set. Safe mode is deprecated in PHP 5.3 and completely removed in 5.4+ versions, so you should not use it with CustomBuild 2.0.
