Ok, so I got one of these bassed on the very good reviews here and the impressive internet comercials. I must be doing something wrong: I have the midi cable going from the Tyros "midi out" to Harmony M "midi in"

To be honest I don't hear a difference if the Harmony is pluged in with midi cable or not. I don't here harmony changing according to the left hand chord changes. The "harmony" sounds to my ears like 5th and octaves.

Maybe there is a setting on the Tyros 2 that I need to activate?

Please help!