Left and Right region is not showing on ZEN sub theme
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I've been working right now on a custom sub theme via ZEN for a certain Drupal site. I had it first developed in my localhost. Right after I had the half of the basic design implemented, I uploaded it immediately to the site and had it enabled. Now, something is wrong. The two regions are not showing up when I tried to view them on the block administration page. Even if I put a block on each of them, still they don't display on the page... what could it be?

In my localhost, it's working fine. I'm not sure why it's not working well on the live site. Has anyone of you experienced the same issue? Any help or suggestion is very much appreciated.

thanks in advance.