Recaptcha not working

I tried to use re-captcha for spam protection. I enabled the plugin added both keys from Google Re-captcha. Select Recaptcha as default captcha On global configuration. and did same on Contact component. But still it doesn't appear on the contact form.

Please take a look here:--

https://www.projectmanagementpractices.com/contact

Let me know what i am doing wrong!

I have gone through this post:--
https://www.gavick.com/documentation/un ... ptcha-code

And there already right code used there as you have explained in the post but still doesn't work.

I am using the same keys and the captcha works fine on K2 Registration on Site. Please check here:--

https://www.projectmanagementpractices. ... =blankpage

Any help on this issue?