Plug In Problems….

I am using wordpress on my Blog using a fairly simple template design. I have managed to put things together such as text, photos etc., but I cannot seem to download or use any plug-ins that I have tried. I treid using 6 – 7 different Facebook ‘Like Button” plug ins, and every one of them failed to show on my front page. I have tried different browsers, cleared the cache, updated the plug-ins, but nothing seems to want to work. Then I tried what I figured would be a simpler plug in – a couple weather plug-ins and a “follow” plug in – same problem. I’m not getting error, I’ts just that nothing shows on the page at all. Am I using a template that may not agree with plug-ins?