free plugins in jmailalert v.2.5.4 is not working?

good day everyone i just want to ask why this 2 plugins are not working in my jmailalert 2.5.4?? (JMailAlerts - Content - Latest Articles / News and J!MailAlerts - DJ-Classifieds - Latest Ads) and only this plugin is working J!MailAlerts - K2 - Latest Items... they are not showing in my emails even if i already put the information that needed in displaying the content. thank you...