The way you have it right now your event structure locks up your state machine. I don't know where you're going with the program, but one could argue that your state machine is not necessary.
As for other issues:
- The buttons in the clusters are not ordered correctly. At least with respect to the numbers you've assigned via the button text. Right-click on the cluster and select "Reorder controls in cluster..."
- The fundamental problem you have is that the "new" cluster you are receiving is not the final value. You are actually receiving a "transitional" value in which you will have two buttons as True. Just put a probe on "new" and you will see. The subVI you have is assuming only one button is true for either the "old" or "new".
- You are not initializing the cluster so that you enable all of the buttons and set them to False.
Ultimately, it seems to me that you're just trying to reinvent radio buttons. LabVIEW already has radio buttons and you can customize the radio button control to use square buttons instead of the circular buttons. You can even add the lines that you currently have. This seems a heck of a lot easier than what you are trying to do.
