:after pseudo element not working

For some reason :after pseudo elements aren’t working for me with Customizr and I’m wondering if it might be a theme issue.

I have this html on the page:
<div class=”AfterContentTest” style=”text-align:center;”>
Testing Class With Content Added After
</div>

And this CSS in my style sheet:
.AfterContentTest:after {
content: ‘#AfterContentTest’;
}

But ‘#AfterContentTest’ does not show up on the live post. Anyone have any idea what’s going on?

Thanks,
Sam

The page I need help with: [log in to see the link]