I'm a new Sony Acid Pro 5 user and need assistance. Whether I set up a DLS or VSTi soft synth, and I create a MIDI track linked to them, I can edit the track in Track Properties' Piano Roll Editor, and can preview or hear the sound there. However, when I exit the Track Properties window back to Sony Acid Pro 5, there is nothing in the track, and nothing can be heard when it is played. How do I get music entered in Track Properties to show up in the Acid's Track?