UTM codes not passing into mailchimp

Hi, I am having the same issue and this solution does not seem to be working.

Here’s my form code:

<center>
<p>
<label></label>
<input type="email" name="EMAIL" placeholder="Enter Your Email" required />
<input type="hidden" name="OPTINOFFER" value="8 Reasons Article">
<input type="hidden" name="OPTIN" value="{current_url}">
<input type="hidden" name="REFERRER" value="{data key='utm_source'}" />
<input type="submit" value="Get the Guide" />
</p>
</center>

Here’s my URL:
….com/8-reasons-to-try-cbd/?utm_source=test&utm_medium=test&utm_campaign=test

Here’s my Mailchimp Test:
http://screencast.com/t/ak3BmXEP

…For some reason it is pulling in the code string rather than the data.

Thanks!

https://ww.wp.xz.cn/plugins/mailchimp-for-wp/