Sony handycam image mixer

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i have an old model sony tvr 19 handycam. since my pc has just been reformatted, i re-installed the image mixer. i used it to capture / transfer the video that i have taken (casette tape). it was transferred to the image mixer album file, however when you play it, there's no sound. Soundmaxx is ok, fyi. Also, pls help as i dont know how to save it in my hardware then to a removable usb/storage device to be able to edit and add the first part of the video into it. your assistance would be highly appreciated. thanks.