Vocal Harmoniser and Midi Songs

Hello everyone,
I need help. So, please someone try to find time to answer me. I recently bought keyboard Yamaha PSR-2000. This keyboard has vocal harmoniser built in. It works perfectly when I play live and sing. But vocal harmoniser doesn't work properly when I sing along with midi file song from floppy (in my keyboard).
Midi song simply doesn't give harmony information to vocal harmoniser I tried to do everything I knew but I didn't succeed. By the way I'm sort of beginner in this area.
So, please someone tell me what to do (how to set my keyboard).
Thanks !

To get the Vocal Harmony control on a song as you are looking for:
1. Press the [Mic Settings] button
2. Press the [E] button (left side of the display) to access Vocal Hamony Control.
3. USE the Up and Down buttons under the display beneath the song channel to choose a song track that has the chord information to drive the Harmony correctly.

Regards,


------------------
Steve Deming
Assistant Manager
Customer Support Dept.
Pro Audio & Combo Division
Yamaha Corporation of America