Including the file, the program opens, but it looks like this.
By touching the controls I have managed to get the background colour not to be black, but I can't get the TreeCtrl to load with data.
Please, if you want us to help you, prepare a simple demo that does what it needs to do to demonstrate the problem.
You can't ask the person who is going to help you to work harder giving you the solution, than the time you spend preparing the example case.