I am unable to select output ch 1/2 from the VST Channel Mixer. Echo support says that this is because some other application has 1/2 in use. I am running XP Home and used the task manager to kill anything that looked like it was using audio. Does XP start some application I am unaware of that is tying up the channels? I can switch the output to ch 3/4 and the demo song plays back fine. When I am using output ch 1/2 and play the song back, all I hear is the click track. Someone understand what is going on? Thanks!