Not working as expected

Hi I’ve installed the plugin (2.2.0) but all the code I enter into shortcode tags shows html entities for things like quotes. What am I doing wrong?

[prettify class="java"]ApplicationContext applicationContext = new ClassPathXmlApplicationContext("/applicationContext.xml");[/prettify]

Ends up as

ApplicationContext applicationContext = new ClassPathXmlApplicationContext(“/applicationContext.xml”);

I must be missing something simple?

https://www.ads-software.com/extend/plugins/sunburst-code-prettify/