Reza,
Thanks for the admin credentials. Unfortunately, I wasn't able to figure out the cause. Basically, it seems like something in the Gavick template you're using is actually stripping the Like button from the page. If you look at the HTML, you'll the div jfbclike be opened and closed right before and after the article. However, there's nothing inside the div, when there should be the normal <fb:like... tag.
Things we tried:
1) Re-ordering our JFBCSystem plugin to the first and last positions. Sometimes, this clears up conflicts with other plugins. That had no effect.
2) Disabling the JFBCContent plugin. With this disabled, you'll see the {JFBCLike ..} tag in the article. This (later) gets replaced by the proper <fb:like.. tag. On your site though, something seems to be replacing that.
3) Trying with a different template made the Like button appear, as expected. You can see this below:
www.stocksmatter.com/index.php/resource-...-down?template=beez5
Everything else in your setup looks right. I don't know where to go from here, other than having you ask a similar question to the Gavick folk. Mainly, "Does your template remove other Like button code if the social Like settings in the template are turned off". If that's the case, there's not much we can do.
Hope this helps get you started, and definitely let us know what you find out!