[Plugin: WP-reCAPTCHA] Didn't work

It didn’t show up in my contact form. Gravity Forms integrates with reCAPTCHA, and that showed in the form. But when I activated WP-reCaptcha, it disappeared and the WP-reCAPTCHA did not replace it. Deactivated WP-reCAPTCHA and refreshed the page and the old one reappeared. Guess they cancel each other out.

http://ww.wp.xz.cn/extend/plugins/wp-recaptcha/