1. Make sure both "Master Volume" and "MIDI Volume" are turned up on your computer ~
(in Windows: Start > Control panel > Sounds and Audio Devices > Audio).
2. Depending on your computer's capacity, too many other programs and/or browsers may be running simultaneously.
To VIEW, PLAY AND PRINT the FULL-SIZED scores, plus many others, GO HERE to the Score Exchange site of Ralph Schneider.
All plays are free, and most of the scores can be printed for free at top quality on your own printer.
You can also get enlarged views of the scores using your browser's zoom function - the playback is the same but you may have to regularly scroll up and down to follow the notes as they play.