Advanced Panels – Additional CSS Classes

Hi,

I’m trying to find the Advanced Panel in the block settings. I have everything checked in the Options under Advanced Panel, yet nothing shows up. I have a local copy of the site and I see the Advanced Panel. So it’s the same type of block, yet one site doesn’t show it. I’m an Administrator on both sites.

All I want to do is add some Additional CSS Classes. Funny thing is that I had this option before and now it doesn’t show.

What determines when this options shows or not?