reply message to rejected users

i'm trying to display reply message to users whos passwords get rejected. so I setup the group and added my test user there. then i went to groupreply table and added reply message there. Now when I do my testing is password is ok the message is displayed BUT if password is incorrect the message is not displayed. I'm sure i did something wrong. So the question is: how do i display message to the user if their username gets rejected by any reason? thanks for help!