Call to undefined function

Hi,
I'm getting the following error when trying to modify a profile field using Rules module.

Fatal error: Call to undefined function views_bulk_operations_profile_action_submit() in mysite/sites/all/modules/rules/rules/modules/rules.rules.inc on line 409

and here is the function which causing this problem.

function rules_core_action_execute_submit(&$settings, &$form, &$form_state) {
$element = $form_state['element'];
$info = rules_get_element_info($element);
if ($info['configurable']) {
$function = $info['action_name'] .'_submit';
$settings = $function($form['settings'], $form_state) + $settings;
}
}

I'm using drupal core 6.22.