refinery_pages_show.html.erb

Objective: Display "hello world" in "U ponudi" page. (page "u ponudi" is created in backend in Pages tab)
Obstacle: When I overrode pages/show.html.erb file and modified it so that it displays "Hello World" on body_content_left, I don't get "Hello World" on my screen. I just get the content that i placed before in backedn.

This is the FIRST thing I tried. It's not working:
<% if @page.title == 'U ponudi' %>
	<% content_for :body_content_left do %>
		<h1>Hello World!</h1>
	<% end %>
<% end %>

This is the SECOND thing I tried. It's not working:
<% if @page.title == 'U ponudi' %>
		<h1>Hello World!</h1>
<% end %>

And even if I just place 
<h1>Hello World!</h1>
inside show.html.erb, that content is not displayed on screen.