mm_changeFieldHelp does not work for me in Modx Evo 1.0.5

mm_widget_showimagetvs(); // Always give a preview of Image TVs
mm_hideFields('content', '', '7'); // Hide the content field for documents using template ID "7"
mm_hideFields('longtitle'); // Hide the longtitle field 
mm_hideFields('description');
mm_hideFields('link_attributes'); 
mm_renameTab('settings', 'Publication settings');
mm_changeFieldHelp('pagetitle', 'This text will appear in the browser title bar and bookmarks'); 
mm_changeFieldHelp('alias', 'For search-engine and user friendly urls- appears after emptybiker.com in the address bar'); 
mm_changeFieldHelp('introtext', 'A concise and informative sentence or two that will appear in search engine results to describe the page');