No audio after TMPGEnc

I just encoded an AVI file, MPEG 1 640/272, 23976 fps, CBR 1150 kpbs, Layer-2 48000 Hz 192 kpbs, around 700 MB.

Once the encoding by TMPGEnc was complete, I followed the instructions and played it in Windows media player to check the audio sync and there was no audio.

I followed the AVI to VCD instructions. Anyone know what happened and how to fix. Thanks.