@PATSAV27 Message Plus is a great application with awesome benefits. I definitely want to make sure you enjoy it. I certainly want to make sure everything is resolved for you as soon as possible.
Are you having problems with any other notifications? Have you tried to uninstall/install the application?
Let's check the Notification settings; visit our “Turn Notifications On/Off” page http://vz.to/2p5yOBI and follow the steps to check your phone notifications.