[tbworld]

Most likely you did not include the dependencies, in order to call save_settings();

I have not tried to do what you are doing, so I do not have an answer for you off the top of my head.

--------------- Added 26 Jun 2014 at 14:10 ---------------

//Noticed this function from class_upgrade - might be what you are looking for.

PHP Code:

function set_option($varname, $grouptitle, $value)
{
include_once DIR . '/includes/adminfunctions_options.php';
$values = array($varname => $value);
save_settings($values);
}