Inbox will not automatically update

Just started using eM Client. Like the format BUT while the incoming email updates when I open eM Client, it will not get new emails when I manually ‘Refresh’ or when it goes out every 5 minutes. It goes through the motion as evidenced by the popup window but the new emails do not show up in my Inbox. Closing eM Client and then opening it again will display the same popup window but will add any new mail to my Inbox.