plugin issue

Hi!
This plugin is the only one i found to be working on Arras theme but than i found out in all post, comment section, captcha do not work with this plugin.
I have Sweet Captcha installed, you actualy need to drag one picture to another.
http://www.sweetcaptcha.com/

Is there any solution? I have the free version.

http://ww.wp.xz.cn/plugins/wp-content-copy-protection/