Can not get "SyntaxHighlighter Evolved" to work

Hi

We wanted to show code at our blog the fancy way and SyntaxHighlighter Evolved plugin was great solution…until we found out we can not make it work!

We installed it properly, Activated it, set some custom settings and tried to use it.. But unsuccessful. You can check the test blog post here(it is WordPress integrated to Magento): https://e-radionica.com/blog/2015/08/20/247/

Code we try to use to activate plugin was:
[code language="cpp"]some code[/code]
<cpp>some more code</cpp>
[cpp]code code code</cpp>

We DO have <?php wp_footer(); ?> somewhere in our footer.php file(it already was there, Twenty Twelve is the theme).

Thanks anyone on help! If you need some more info, just tell!
David