Hi,
You said that in the CMC applications > configure repository you only see database name and nothing else like servername/port/user... If so then there is something wrong with the IS repository, corrupt/invalid perhaps and this is why the IS job won't added.
So you need to fix the IS repo first. To do so, you can try to use "Information Steward Repository Utility" in order to create a new Information Steward repository and associate it with your current Central Management Console (CMS) system database. See guide attached in this kb http://service.sap.com/sap/support/notes/1773657. Thanks Nawfal