Thank you John! looks like I was using a Button from the Coaches toolkit, and that’s why I didn’t work. As soon as I switched to a Button control from Spark Toolkit, it worked fine.
I need to remember this well! On the other day I had a similar problem where the Table control displayed the label in each row, even after selecting “Hide” option. Then I realized I was using the Output Text of BPM toolkit, and it worked fine after switching to Spark’s Output text control.