N-arry Trees And Treeview?

I have developed an n-arry tree. (like a binary tree but with numerous leaves per branch) in the hopes of developing a neural network test. The tree is built in a custom tree class that adds to the tree each run. Each time, new segments are added to the tree from 1 individual action. It can only have 1 action per run, so I might do action 1 the first time, and have a giant branch under that, with nothing under action 2 and action 3. The second run, it chooses action 2 the first time, so now I have a giant branch under action 1 and action 2, and nothing under action 3. That works all fine. The part that isn't working is the treeview I am using to display the tree after each group of actions is finished. Code is below.

It works fine the first run through. Except I'm not quite sure how to check whether a branch exists for the second run through, so instead of adding a second group of action 1, action 2, action 3, it jumps down that branch.

[Code]...