Video but no Audio

I have downloaded the following video using bit-torrent 'stargate_sg-1.8x18.threads.ws_pdtv_xvid-fov.avi' but when i try to play it i get the video but no audio. I have used 3 different video inspector programs and they all say i have the necessary codecs instaled.

I have searched for ages and tried everything i can think of with no success, can someone please help me.

Thanks

maybe u have downloaded a corrupt file. try a different source for file or re-download