n2mc

I have a Sanyo CG10 camcorder which records MP4-AVC video at 720p with mp4a AAC LC audio at 48000hz (128kb/s) The video plays ok in Videopad but the audio does not play. If I play an MP4 video from my mobile phone which records mp4a AAC LC audio at 11025hz (64kb/s) it plays the audio ok as well as the video. So, why does VideoPad not play audio from my CG10 ? Thanks for the help in advance n2MC