PlayThru Captcha not showing up in Joomla

I have just installed the PlayThru Captcha but it isn't showing up. Here are the Specifics.

Joomla v.2.5.13
Gantry Template v.4.1.12
Kunena v.3.0.1

I followed the installation instructions exactly. I activated the plugin, entered the necessary information, chose the PlayThru Captcha as the default for the site setting. Even when doing all that the default recaptcha still shows up. I even tried disabling the default captcha. If I disable it and leave playthru captcha enabled and set as site default I get an error message that says "Captcha plugin not set or not found. Please contact a site administrator". Could this be a problem with Kunena integration with Joomla? I'm wondering because the Kunena configuration has a section to enter the public and private ReCaptcha keys. Thank you in advance for your attention to this matter.

Regards!