Hi, I'm developing a mobile app(flex 4.6 sdk) and i want to use tree component for some part of my app where some items are listed according to their levels(1,2,3,4,5) . I cannot find any notation for tree. I did some research and found <mx:Tree> component but it does not work when I implement xmlns:mx="library://ns.adobe.com/flex/mx" statement into app. It gives this error:
"Could not resolve <mx:Tree> to a component implementation."
In addition to this, when I want to use AdvancedDataGrid for the same purpose it (<mx:AdvancedDataGrid>), it gives the same error.
Can anyone help me about this issue? Is this mx notation out of date or is there any way to implement it to project?