I find it convenient to grab midi files from the web and use them in BIAB. I am currently using BIAB 2014. Often some of the tracks in the file I get are too loud while others are too soft.

I have tried opening the midi file in Realband and using the mixer to change the volumes. After I do so I save the midi file in Realband in open it BIAB. However, the volumes of the tracks are not changed when I play the midi file in BIAB,

What am I doing wrong?