All Related Posts Plugins Not Working

Hello,

I am trying to add a plugin that will list related posts or pages to my website. I’ve installed several but none of them will actually display anything. The back-end of these plugins work fine for me. I’m able to select which posts I want to list, etc.

When I check the front end.. nothing. I’ve reloaded the page to make sure. Then I delete each plugin before moving on to the next. No luck. I am wondering if it has to do with the theme I am using? I’m using Twenty Ten.

Any ideas? Thanks