Response from the site administrator
teslineinc, 04.07.2016
Dear customer,
sometimes, Android phone downloads the audio file as html-file. In this case you need just to change the extension of the file to 3gp.
Possible, the audio file was too big, and it was damaged during the transmission. Try to find it on target phone. Launch Kidlogger PRO, Menu / Preview log file / Audio list tab.