Logstash can't see data in S3 bucket on AWS?

Question

Amazon Web Services

Colleagues, something of my Google-fu is stalling.
we have an instance on AWS in which Logstash is installed. It perfectly parses local files. The task is to feed it with the logs that are in the basket on S3.

input {
  s3 {
   bucket =>  "[имя_корзины]"
   delete => false
    interval => 60 # seconds
    prefix => "/"
    region => "us-west-2"
#    type => "cloudfront"
    codec => "cloudfront"
    secret_access_key => "ключ"
    access_key_id => "ID_ключ"
    sincedb_path => "/opt/logstash_input/s3/cloudfront/sincedb_cloudfront"
    use_ssl => true
  }
}
output{
         stdout { 
           }
}

this bastard does not swear at anything, stupidly silent. there are definitely files in the bucket, they lie at the root. CHADNT?
Upd.

s3cmd ls s3://имя_корзины/
2015-12-14 08:59       665   s3://имя_корзины/EFU10WYEZ98VX.2015-09-17-11.e2e0ab2c.gz

those. the instance bucket sees, there is a file in the root.