BuddyPress.org

Hi, i tried to access unread messages from other users, but the following code gives me only access to the account messages, i am logged in with.

Here is a part of the code. If i use another user ID then the current logged in account, i get no results.

...
      $aParams ['box'] = 'inbox';
      $aParams ['per_page'] = '99';
      $aParams ['user_id'] = $UID;

      if (bp_has_message_threads($aParams)) {
          while (bp_message_threads()) {
              bp_message_thread();

              $subject = bp_get_message_thread_subject();
              $excerpt = bp_get_message_thread_excerpt();
              $from = bp_get_message_thread_from();
              $unread = bp_message_thread_has_unread();
              if ($unread){
              	$messages .= ' From: ' . $from . ' Subject: ' . $subject . ' Excerpt: ' . $excerpt;
              }
            }
        } else {
            return array("message" => "no messages");
        }
        return array("all messages" => "$messages");
...

I am using WordPress 4.2.2 and BB 2.3.1