EE2: Captcha if statement not working

Question

I am trying to add a captcha to a site that is running EE 2.6.1. I am using solspace freeform 4.0.12 (the free version, not pro) and accessible captcha 2.3. The code for the captcha is

<tr>
    <td colspan="2" style="margin-left:144;">
        {if captcha}
            <p>{captcha}<br /> <input type="text" name="captcha" value="" size="20" maxlength="20" style="width:140px;" /></p>
        {/if}
    </td>
</tr>

When I remove the {if captcha} tags, the question/answer pair shows up, but it also allows the form to be submitted with an incorrect or missing answer.

I have also tested the page on multiple browsers to make sure that I'm not logged in.

Any suggestions?

Answer 1

For our FreeForm forms, we use the following code:

{if freeform:captcha}
      {freeform:captcha}<input type="text" name="captcha" style="width:140px;" />
{/if}