Yamaha PSR 620 Keyboard - Won't Play Midi File containing Songs

by Rashid
(KL, Malaysia)

I have a Yamaha PSR 620 Keyboard and I am trying to play midi files (containing popular songs) through it.

The problem is that the Yamaha PSR-620 just won't play it back.

Though it seems that the PSR620 can read the midi file, since I am able to see the song title on the LCD screen of my Yamaha Keyboard.

How do I make the Yamaha PSR 620 Keyboard to play the midi file?