Problem with video recording

Few years ago I bought Samsung miniDV camera (VP-D371W), not expensive, good record quality, everything working perfect, even recording to a computer, then editing and recording to DVD. Few months ago camera a child pulls the charger cable and camera fell to the floor and instantly died. I had a few tapes left not recorded to a DVD so I bought a Sony camera (DCR-HC53). Now when I try to record video that is taken by Samsung camera to a computer (using firewire cable same I used before on samsung) got video in good quality but canot get audio stream so it's useless. Cannot find any of the Samsung models camera. My question is if anyone know how to record video or is there any kind of firmware upgrade or some special software to record video and audio, or just to extract audio because I can get video using any software, but audio was unable to hear even on camera during playback.

Hope this is the right place for this thread if not sorry.

Thanks for your answer.

PS. Sorry for bad english

Can you tell us what speed was the tape originally recorded with? SP or LP? What audio format was recorded on the tape? 12-bit 32khz or 16-bit 48khz? As an emergency work around you could copy the audio from the camcorder's analog out to the pc's mike input, and then sync it manually with the video footage. It's amazing how often analog saves the day. Also look at the settings in your capture window. Make sure you have selected audio as well as video.

It's recorded as LP, I can't remember correct audio settings but I think it's 12bit, don't have audio on analog output from camera, so that don't work (already tried before).

Thanks for quick answer