[Plugin: qTranslate] Problem with redirecting

I use qTranslate on http://sunggems.co.th/demo/ with English and Thai languages. But, I added both languages just on http://sunggems.co.th/demo/#!/demo/?page_id=2 page only (for demo)

When I start browsing my website in another menu (in the left panel)abd then click on the qtranslate, it’s redirected me back to http://sunggems.co.th/demo/#!/demo/?page_id=2 NOT the page that I browsed

How can I solve this problem?
Please help.
Thank you 🙂