Hi,

Sorry to ask a ridiculous question but in step 8 detailed at

http://drupal.org/node/717742


// This is the new validation handler for our Reset button. Setting
// the $form_state['rebuild'] value to TRUE, clears the form and also
// skips the submit handler.
function my_module_my_form_clear($form, &$form_state) {
    $form_state['rebuild'] = TRUE;
}

It suggests the fields should be cleared when you press the button. For me all of the fields remain the same.

I am using drupal 7

Thanks
Iain