Problem with Design Studio and QML

[berrada]

Hi, I have some really nerve-wracking problems with DS and QtQuick, firstly with DS I open or create some ui.qml files , and I can see in navigator that this file has some components but the problem is that I don't see any of them in the Form Editor, no windows no rectangenothing, other problem is that when I run the project to show the application, nothing happened, it build the app without any errors but it doesn't show anything, I have this particular problem also when I try to run .qml files