Dear John,

1. Yes of course, i meant google webmasters tools. Google let you choose the preferred domain to index your website, with or without www prefix. After that the Joomla website must run accordingly with the same domain chosen
>>>> I checked, i entered www.runningtext.id

2. Ensure that you are accessing the Joomla backend accordingly, http://www.runningtext.id/administrator or http://runningtext.id/administrator. If you are working for http://www.runningtext.id you must access and work with jsitemap using http://www.runningtext.id/administrator and not http://runningtext.id/administrator
>>>> I have been typing runningtext.id/administrator. What happens if I access frontend and backend differently?
Sorry I still dont see it will affect anything.

Thanks,
Teddy