@rwchampin – to show inline code, just wrap it with `backticks` `. If you want to show blocks of code, just make sure to indent by four spaces or select the text and use the code button above the editable text area.
As for your question, you should be putting that tag *before* your closing `` tag. Is that what you meant? Do you have a link to the site? What do you mean by “…it’s not changing anything”? What are you expecting it to change?