All my posts have a custom field on them: 

Key: CastlefordNewsArticleHeadline

Value: This is a test headline.

I have a content slider module on my page and when I navigate to the ContentSlider -> Manage Settings -> Widget Settings -> Item Template  and adjust it to reference my customfield - no values are being returned in generated html.

I'm using the syntax highlighted in the widget settings.

[customfield:xxx] - xxx is the key of the custom field.

which translates to:

[customfield:CastlefordNewsArticleHeadline]

Or with the full template:

<div id="postItem_[POSTID]">   

<h3>

  <a href="[TARGET]">[customfield:CastlefordNewsArticleHeadline]</a>

</h3>    

<p>[EXCERPTTEXT]...</p>

</div>

This produces html like so:

<div id="postItem_47">

<h3>

  <a href="http://localhost/attempt5/HealthNews/tabid/86/entryid/47/Headline-Four-This-is-the-title-of-the-article.aspx"></a>

</h3>

<p>The home secretary is to be quizzed in the Commons regarding border control....</p>

</div>

But I would expect this:

<div id="postItem_47">

<h3>  

  <a href="http://localhost/attempt5/HealthNews/tabid/86/entryid/47/Headline-Four-This-is-the-title-of-the-article.aspx">This is a test headline.</a>

</h3>

<p>The home secretary is to be quizzed in the Commons regarding border control....</p>

</div>

Am I missing a vital step in the process?