Chords will disappear if they are entered in a way that is not recognized by Band-in-a-Box. Do you think you could be making a typo when entering the C? The X key and the V key are right beside the C key on the keyboard and if they are accidentally entered before or after the C then the chord will disappear.

Also, in the plugin please go to File | About. What is the version number listed there?


Best,
Chantelle