If everything indicates that the problem needs to be fixed, you first should determine which side the error occurs on. That is, network status should be green in color both for you and for your interlocutor. Make sure that you and your interlocutor are online. To download the latest versions, visit the following pages: This is very important in order to eliminate incompatibility problems between old and new versions. You both should use the latest versions of Skype. The fact is that the same notification appears if he clicks on the “Hang Up” button. You must be sure that the user who receives the call does not discard deliberately.