[Mowaffak]

Thank you for the prompt response. Let me present the problem in a more elaborate way. I started a project based upon importing personal MPEGs (in DVD format)previously captured via anothering capturing software (windvr3)from my mini DV Panasonic video camera.The first MPEG imported went well with perfect audio and video after audio conforming. The second MPEG to be imported showed similar process of audio conforming. When I dragged it to the time line , its audio track did not show the wave forms and I could not hear the audio as the video played back. I undersand your auggestions and will try them in the worse case, but I do not know why one clip goes well and the other did not although they are of similar source and format. Finally, in the same project, I imported an MP3 file and every thing went perfect. Thank you for help