I have discovered the specific problem with the sounds. I will do my best to explain and maybe someone can figure out how to fix it. For one part I have the player on marching snare for mvmt. 1, then it switches to hi-hat for mvmt. 2, and it goes back to marching snare for mvmt. 3. The score is written as one long piece with double bar lines and text stating the beginning of each movement. With the mixer open I discovered that the sounds are fine for the 1st and 3rd mvmts, but when the instrument change happens the entire mixer changes to "unallocated" for the sound libraries when I try to enter notes using my M-audio Keystation 88es. I need to get this corrected today if at all possible. I'm already way past my deadline for getting music into kids hands. Thanks.