Picture but no sound with WinAvi video capture

Hello, I am running WinAvi Video Capture.

Record & playback of video is fine.

No sound record.

Checked configuration and have 2 options for sound, mic or line-in. My laptop sound device is inbuilt High Definition Sound Device.

This sound device is ok with Windows Media Centre.

How may I initialise sound device for WinAvi Video Capture?

Thank you