problem in using phptemplate_views_filters function

i install drupal 6.16 with cck and views
i read http://drupal.org/node/199991 and then i add this simple function to garland template.php for changing submit function title

function phptemplate_views_filters($form) {
 if ($form['#view_name'] == 'test1') {
     $form['submit']['#value'] = 'Filter';
 }
  return theme_views_filters ($form);
}

my default theme is garland
and i do not see any change in my form
i can not use form_alter hook because i want Put exposed filters in a fieldset and if i use form_alter i have some problem with changing structure of form