Disable next button until user enters text into all text entry fields on slide

Hi all,

I was going to post the same question but since a conversation related to this subject was already started I thought I would post here. I am having similar trouble to Marcella and *think* I understand and correctly applied the solutions discussed here but I still can't get my slide to function the way I want it to.

In the Self Check slide, I want the students to HAVE TO fill in all four text entry fields before they can move on to the next slide.  As Greg suggested I created a layer called "Unfinished" that students get if they try to submit less than all four answers. That trigger seems to work fine.

My issue I am experiencing is that even if all four data fields have text I STILL get the Unfinished layer appearing rather than going to the next slide. I thought I built the trigger correctly but I need a second (or third or fortieth) pair of eyes to help me.

Thanks in advance