Array rotation problem

I’m trying to model a 20 sided die

I have both 5 sided end caps complete and I’m trying to make the rest of it. I have to put a face on each edge of the end caps and rotate them downward. I’m trying to make an array and rotate them into place, but when I try to rotate the empty I use to space the array it doesn’t do anything

I used this exact technique to make the end caps, so I have no idea why it isn’t working