I'm using both myself in my site:
Because I'm neurotic (just ask my wife), I'd start fresh and re-install both plugins. Then:
- Go to the BWP reCAPT page and re-add the pair of API keys which you get from here: https://www.google.com/recaptcha/admin/create
- Remember also that the default setting in the plug has Hide the CAPTCHA for registered users (even without any capabilities) checked. Hence logged into the wordpress dashboard makes it invisible
- Regenerate the recaptcha key (ie. <p>[recaptcha recaptcha-XXX]</p>) and add to the form and save.
The easiest way to double check is try in another browser (I typically code in Firefox but view in Internet Exploder for viewing because if it looks decent there, you're Golden).