Image state should get changed on a trigger

Hi,

Using storyline 2, and developing a screen where I need build a chart on clicking each step.

I just need to change the state of background image when all steps are clicked and in disable state.

have inserted a trigger on image which is like this , change the state of image to state 3 when all of selected steps are in disable state.

but its not working.

can any one help here please, can not share file sorry for that...

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