What video codec does the avi file use?
Where did the file come from? Screen recording software? A Camera?
Does the avi file play normally in other software?
This is possibly a codec issue, I would reccomend re-rendering the files in a program such as sony vegas and then importing the rendered file into AE.
In addition to the questions that Andrew asked, please answer the questions here:
from a camera, it plays normal on windows player, but on after eeffects..
i tried, but no
We can't help you until you answer the questions here: