General Support: Problem with a big picture

Hello to all

I have instaled the new version of Plogger and put there a theme from Ardamis called Brodway 2. Everything work fine, but when I want to see a big picture, it is not displayed. When I look to the source code, there is a section:

<div id="picture-holder">
<a accesskey="v" href="#"><img class="photos-large" src="//images/ireland/connemara/01.jpg" title="White horse" alt="White horse" /></a>
</div>
In the src command is not information about the webpage and I have this set in the settings. The page looks like this:

http://www.janzak.cz/?level=picture&id=260

Can somebody know, how to fix it? Thanks a lot.
Jan