Emails not sent

Hi there,

I have installed and set this plugin to send a notification to the user when the password is changed.

The problem is that the emails are not being sent. WordPress standard emails are being sent. I have now disabled the standard email using this line of code:
add_filter( 'send_password_change_email', '__return_false' );

Your assistance to solve this issue is much appreciated.

Stephen

The page I need help with: [log in to see the link]