Per http://wordpress.org/plugins/captcha/faq/,
I inserted this successfully in Sweetdate general-register-modal.php (captcha shows but does not work)
<?php if( function_exists( ‘cptch_display_captcha_custom’ ) ) { echo “<input type=’hidden’ name=’cntctfrm_contact_action’ value=’true’ />”; echo cptch_display_captcha_custom(); } ?>
Uncertain about instruction below to “add the lines to the function of the entered data checking”
<?php if( function_exists( ‘cptch_check_custom_form’ ) && cptch_check_custom_form() !== true ) echo “Please complete the CAPTCHA.” ?>