Upgrade reCaptcha V2 on FormMail V9.10 fails

I've tried to follow the instructions to integrate reCaptcha v2 into the current version of Tectite's FormMail.  I keep getting a 'verification' failed error.   I've followed the directions very carefully but still get the error.  The Widget shows up ok but, as I say, verification fails.  On the FormMail instructions this is what's they say is required and it appears to agree OK with the reCaptcha instructions:- Install the reCaptcha widget code into the section of your page: Display the reCaptcha widget in your HTML (just before your submit button, for example):

Replace your_site_key with your reCaptcha site key (this is not the secret key; it's the other one.) Reload your HTML form in your browser. It should now display the reCaptcha widget. You must derive a field called "imgverify" from the reCaptcha field "g-recaptcha-response" so that FormMail receives the user's CAPTCHA input. Here's an example of this:

Now proceed to the following steps on this page (below). Modify the configuration section of your copy of FormMail to include the secret key you received from the reCaptcha admin. You need to set the RECAPTCHA_PRIVATE_KEY setting in FormMail. For example: $RECAPTCHA_PRIVATE_KEY = "6LgQQgATAAAAALWHy4k0uPSmnr7chET_T74cvzqZ"; Use the REQUIRE_CAPTCHA feature to enforce reCaptcha validation: $REQUIRE_CAPTCHA = "Confirm you are not a robot."; -- You received this message because you are subscribed to the Google Groups "reCAPTCHA" group. To unsubscribe from this group and stop receiving emails from it, send an email to recaptcha+unsubscribe@googlegroups.com. To post to this group, send email to recaptcha@googlegroups.com. Visit this group at http://bit.ly/1dkFnYd. For more options, visit http://bit.ly/P65DvS.