Hi guys.
I had a page.tpl.php with a few regions and blocks inside of it. every thing was right, I decided to rearrange regions and block so I deleted the old regions and blocks. but I cannot add new regions anymore!!! Drupal errors that you cannot place any block in this region and besides that when I click on demonstration of regions button in structure->block->Demonstrate block regions, it doesnot display this region

this is info file:

name = Pars Institution Theme
description = This theme is designed for Pars Institution
core = 7.x
;Regions
regions[hidden_block]=Hide
regions['leftside']=Leftside
;CSS
stylesheets[all][] = css/style.css
stylesheets[all][] = css/login_block.css

this is php code

.
.
.

<div id="leftside_column" style="float:left;width:280px;height: 100%;">
<?php
print render($page['leftside']);
?>

</div>

I also cleared the cache. what is the problem?

Comments

regions['leftside']=Leftside

should be

regions[leftside]=Leftside

OH MY GOD !!!!!!!!!
it was a crazy mistake!

tnx