Mad Zach Sound Pack Player Problem

Hi,

I'm a big fan from Taiwan, just got the Mad Zach Soundpack with the player.
Got a bit of problem here,
I'm using my MacBookPro 13",
started to use the player with my Midi Fighter Classic.
The software can detect my keyboard and MFC,
I have loaded the sound pack according to the tutorial video,
but there are no sounds coming out.
Do I have to use a speaker or is it fine with the speaker built in my MBP?
Can you help me with this problem?

Thanks!

PS sorry for my poor english.

In the lower right hand area of the player, is "Turn audio processing on/off" turned to "ON" ? I always forget to do this.

After restarting the computer,
and checking the audio processing,
it works like a charm right now~