reCAPTCHA dont show in recover password & username

After enabling EasyCalcCheck PLUS - ECC +, recaptcha window no longer appears in the window to recover the password and username.
Elsewhere works well, only in these places is that does not appear.

5.5.20-log
utf8_general_ci
PHP 5.3.10
Apache/2.2.21 (Win64) PHP/5.3.10
Interface WebServer para PHP apache2handler
Joomla! 2.5.4 Stable [ Ember ] 2-April-2012 14:00 GMT
Joomla Platform 11.4.0 Stable [ Brian Kernighan ] 03-Jan-2012 00:00 GMT
language pt=PT

Really dont know what to do, if anyone can help with this issuse. ty

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