nginx upload 100% and nothing happend

edited October 2014 in General
I am successfully install cumulusclips with nginx web server.
I am also modify rewriterule and now I have working cumulusclips on nginx.
But... I have problem:
I can't upload anything!
1) when I try upload user's avatar, uploadify progress 100% and nothing happend.
in mysql users table, column avatar = NULL
/cc-content/uploads/avatars have some PNG file.

2) when I try upload video file, uploadife progress 100% and nothing happend too..
in mysql I have record about this video file, but ffmpeg never not starting.

what may be wrong ?
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