I'm sorry, I misunderstood your question. That's right, you can not make the display of a question dependent on a previous question when the navigation method is set to sequential. However, you can use my workaround here↗.
Returning to your previous post:
What is wrong?
What's wrong is that you copied the code in the preview display. Use the 
button to switch between preview and code views. You must copy the code in the code view:
