Pro Tools LE demo sessions are installed into a folder named, "Pro Tools Demo Sessions". If this folder is installed into the "Digidesign" folder, the sessions will not play and post a DAE -9125 error.Apparently, there is a conflict when the folder name (Pro Tools LE(TM) Demo Sessions) consists of the "TM" character. Simply delete the character from the folder name or place the folder elsewhere (inside of the Pro Tools folder for example) and the sessions will play back without incident.