Problem with spam bot

[Oboiro500]

Hi,
A spam bot has been writing "replies" or new topics all over my Forum. I tried to download Googole's reCAPTCHA. When I tried to register, I entered http://destinycontrolmetaphysics.org/index.php that is the URL of my forum. I got error message that "URL starts with an invalid scheme". I tired http://www.destinycontrolmetaphysics.org/index.php and got the same message. I tired www.destinycontrolmetaphysics.org/ I got error message that URL must not end with a path. Kindly advise me on what to enter.
Regards,
Hargaalga

[Black Tiger]

I don't know the mod, but did you try to register with hxxp://www.yourdomain.org so without the index.php and without the trailing slash?

[Kindred]

Honestly, most of the captchas are useless...   Use some good questions and change them frequently.