How come when I upload videos from my motorola backflip to my desktop, I cannot hear any sound?

How come when I upload videos from my motorola backflip to my desktop, I cannot hear any sound?|||you have selected to mute video while uploading.. deslect this option on the motorola software on your pc|||Assuming that you can hear the sounds from the videos on your phone... it sounds like a codec problem, try downloading divx codec pack or media player classic, that has a CRAP ton of codecs that can play almost anything.|||if you can hear sound on the video using the computer, then there's something wrong with the conversion process.