I have InDesign CS6 installed (same license) on my work computer and home computer. The Object States panel works just fine at home. But at work the panel shows up, but it is always blank even though I have an object selected that has a State applied to it.
I am thinking I need to uninstall/reinstall and hopefully it will work again.
On a side note, when I save the file down to CS5 from CS6 and open in CS5, the Object States is now visible. I attached a photo. Top two images are screen grabs from file opened in CS6. Bottom two photos are same file opened in CS5. See how the Object States are visible in CS5 and not in CS6.