Can that person open one of the demo documents in the AccessPoint? Can that person see any document thumbnails at all in the AccessPoint? Which type of authorisation is your QlikView server using? Does the new user have sufficient access rights to the QVW document? Are you using Section Access? If so, is the new user present in the Section Access table, and did you reload all those documents that use Section Access?
For access to the QMC, you don't need a license (or anything else). You only need to make the new administrator member of the local "QlikView Administrators" group on the machine running the QMS service.