Change button state based on completing a scene

I am trying to finish a project that has 3 - 100 question assessments. The student must complete each assessment with a score of 98 to pass. I have 3 buttons on the main page and I want to change the state of each button based on passing each assessment. I want to only allow the first button to be active initially and then show that button with a check mark next to it when they pass the first assessment and return to the main screen. I also want to activate the second assessment button at this time. The same thing with button 2 and 3 after completing the second assessment.

I have added a new state to the buttons and set it up to change the state based on a trigger (see attached file) but it is not working. Can somebody help me figure out what I am doing wrong?

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