Disabled Next Button with Slide Layers Using Hotspots

Hi all,

I've reviewed several previous discussions but can't quite seem to find the answer I'm looking for because I'm using hotspots to navigate to my layers. (The client wanted their own custom graphic with five squares used, so I figured hotspots would be the best way to accomplish this.) The users don't necessarily need to click on each square in order, but I do want the Next button disabled until they've clicked on all five squares/hotspots. After doing some research here in the forums, I thought I could make this work by using true/false variables on each layer which would set to true at the start of each timeline. Since I don't need the users to view the layers in any particular order, I added five triggers on the base layer; one for each hotspot. Ex: On Hotspot 1, change state of Next Button to normal if the value of layers 2, 3, 4, and 5 are true. However, somewhere along the line, I did something that is setting the Next button to normal after clicking on Hotspot 1 and I'm not sure where I went wrong. It's entirely possible I totally overthought this and did it the hard way, so any guidance is greatly appreciated. Slide attached. Thanks in advance!