The plugin won't instantiate.

It makes 2 instances when installed, and generates error pages on everything else you try to do after.

This is a test site to work out the bugs.

The problem is with the amount of memory allocated to the script in php. You need to edit your php.ini file to increase the memory to 10 or 12 MB. I increased mine to 12 and everything is working well. Please see this post for more information: http://forums.b2evolution.net/viewtopic.php?t=8512

Great, works perfectly.
This is a primo Captcha.
Thanks, blueyed.

Plugin works perfectly. Thank you for taking the time to create it :)

When I try to comment I get the following error message:

Cannot post comment, please correct these errors:

The captcha code was invalid: No stored private key has been found. You probably do not have cookies enabled or the timeout of 7200 minutes has expired.

I don't understand the "No stored prive key" part and cookies are enabled in my browser.

I just upgraded my B2Evolution to 1.9.2, and I found that the Captcha just failed to work (even I have ungraded Captcha to 1.9.2 also).

Instead of showing the pic with captcha code, it just shows "This is a captcha-picture. It is used to prevent mass-access by robots."

So how can I fix this problem?

Many thanks in advance!

Tim (and others having problems): make sure the "Test..." link at the bottom of the plugin settings page works.

Also for support questions please refer to the forums: http://forums.b2evolution.net/viewtopic.php?t=10577

Mine's broken too after upgrading :-(

Although, when I try the test image it reports:
Additional information about this error:
Invalid Plugin!