Just want you to know that I got an answer to this from another plugin site - my blog's security company. I thought maybe the security plugin was interfering with this Real Simple Captcha plugin - but no. They got it to work. It would be VERY HELPFUL if your captcha support page included the instructions THIS PERSON gave me. Because your instructions simply never address this!
Here is what the other guy said. I was able to follow these instructions and it worked MAGNIFICENTLY:
Tested and it works for me, but I have to say it took me a really long time to figure out how this plugin is supposed to work since there is no help information and the plugin’s support area does not really state what you are supposed to do to use this plugin. I installed Contact Form 7 since the Really Simple Captcha plugin works with other Contact Form plugins and is specifically designed to work for Contact Form 7 since the plugin author has created both of these plugins.
This may save someone else a lot of time wandering around looking for help that does not exist anywhere that I could find help/it.
1. Install Contact Form 7.
2. Click the Add New link to create a new form.
3. Click the Generate Tag button to create the Captcha shortcode/code.
4. Copy that captcha shortcode / code to your Form editing window.
5. Click the Save button to save the code.
The captcha shortcode/code will look similar to this code below.
[captchac captcha-897 size:l]