Infinite Scrolling Plugin Not Working - HELP!

I'm using the infinite scrolling plugin with Covert Store Builder affiliate theme. Can anyone help?

My current selectors are:
Content Selector: #content
Navigation Selector: #nav-below
Next Selector: #nav-below a:first
Item Selector: .post

If anyone has ever used this theme before and can help, I have no idea what to change the selectors to. Thanks!