I have downloaded Express Scribe, but when I try to listen to my wave files, I get the message "codec not installed on my computer." I found a codec at: http://www.cnctranscription.com/OnLineTest.html, which is safe without adding spyware to MY computer, but I am still having the same problem. Is there anyone who had to add a codec to their computer to be able to hear wave files on Express Scribe, and if so what did you do? PLEASE IS THERE SOMEONE WHO CAN HELP???????