Virtuemart Categories List doesn't update in GK5 data source

Hi,
I use Store Box with J2.5. The quickstart package already has some Virtuemart Categories included. But when I create new ones, they don't show up in News Show Pro GK5 data source list. Then I delete all the demo categories, but nothing change: The old ones still there, but not the new ones.
Here is the screenshot from the module manager:
http://hoatay.vn/1.jpg
And the screenshot of virtuemart categories list from virtuemart control panel:
http://hoatay.vn/2.jpg
Please help!

Make sure you have the same language setting for both backend and frontend.

Thank you!