Problem in converting video files.....

[hansraj]

Hi friends....
I recently started converting my existing collection of videos which are *.mkv files generally with 5.1 channel audio. I have been using xilisoft video converter but when I convert the video to the desired format(audio selected to 5.1 for output) my audio output is defected. The main audio starts coming from both the left front and left rear speakers* .... thus spoiling the whole experience. any suggestion...

*Basically the audio which used to come from "front right" starts coming from the "front left" and orig audio which used to come from "front left" starts coming from the "rear left". No audio form centre speaker.