Drag and drop between tree

Here the situation : I have a drag and drop control between two trees and I'm unable the move the node from one tree to the other with TestComplete (manually everything is working fine).

I am really new with TestComplete and I have a strong development background. So, if I need to type some code to make this work I'm totally fine with that.

Here the component that I use with my web application : http://angular-ui-tree.github.io/website/trees.html

I want to move a node from the left under the second node to the right using TestComplete. Is there any way to do this?

Thanks!

Simon