Can't send email with Bulk Operation? Drupal 6 site running on remote server.

I created a View of the User type. Then I create a display to show all users of my site.
I set the Style of the display to Bulk Operation and in Selected operations I checked: Send e-mail (system_send_email_action)

In Fields I added the User: E-mail E-mail and other fields 

Now I go to the path where I can see my users, I select one user (John) and click in send email under Bulk operation. I continue to complete a send the email and finally I get the message: 1 rows processed in about 23 ms:
Performed Send E-mail on user John.

I understand that the email is sent to John user email from the administration site email. 

But I don't receive the email. The email is not really sent.

I have a Webform node in my site which send email with no problems. So, I know there is nothing wrong with my server setting. 

Thanks for any help
Just given it a quick test with VBO 1.10, and as you said, emails are not being sent. Also, got "Cannot use %author token in this context." error in log.

See this issue - http://drupal.org/node/1003354 - "Can't sent email (or 'send tokenized email') on a user view. Reverting to 6.x-1.9 works" - seems that 1.9 should work better, or - if dev is acceptable to you - 6.x-1.x-dev

Or use Views Send instead (http://drupal.org/project/views_send)