i search for the problem in the website, but i didnt found it...
my problem is, when i put my video( format AVI) in the time line i cant see him, but i can hear him. how i fix it?

There is always a problem just nice to know what the problem is and by putting that in the subject means people who have problems and want to search out items will have problems as the subject is generic.

I suggest you do a search on the forum and has been covered before, it is there I know i have seen them, normally a codec problem.