My First Gadget works finally in 5384.4!
Wowow, before I went to singapore training, I open the manifest from the Microsoft original gadget in Vista 5381, I found out that there are some changes and some tab that I don't found frmo the Vista 5270's gadget. So I try to open all missing tab to my first gadget's manifest. Finally, it works, it works.
And when I was in singapore training, Vista 5384.4 is released. And a new update gadget online training are also released update. It is exactly the one I got from 5381. That is why I cannot make it work before.