No Add Device Button

My apologies if this has been answers already, but I'm new to servo..
I've got an iMac, how installed Serviio... Wanting to connect iMac via a belkin router to a Kaiser Bass media player... Following the instructions, however there is no 'add' device button on the Status page.
Any ideas?
I've got an iMac, how installed Serviio... Wanting to connect iMac via a belkin router to a Kaiser Bass media player... Following the instructions, however there is no 'add' device button on the Status page.
Any ideas?