upload module help

[vetri]

hi,
     i am using nginx upload module to upload files.i am running this in
ubuntu.when i upload files .its working fine .but name of the file is
something different .this is not taking the upload _set_form_field
values. i dont know what went wrong.here is my conf file below 

plz help me if u know



worker_processes  20;

error_log  logs/error.log notice;

working_directory /usr/local/nginx;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    server {
        listen       80;
        client_max_body_size 100m;

        # Upload form should be submitted to this location
        location /upload {
            # Pass altered request body to this location
            upload_pass   @test;

            # Store files to this directory
            # The directory is hashed, subdirectories 0 1 2 3 4 5 6 7 8
9 should exist
            upload_store /tmp 1;
            
            # Allow uploaded files to be read only by user
            upload_store_access user:r;

            # Set specified fields in request body
            upload_set_form_field "${upload_field_name}_name"
$upload_file_name;
            upload_set_form_field "${upload_field_name}_content_type"
$upload_content_type;
            upload_set_form_field "${upload_field_name}_path"
$upload_tmp_path;

            # Inform backend about hash and size of a file
            upload_aggregate_form_field "${upload_field_name}_md5"
$upload_file_md5;
            upload_aggregate_form_field "${upload_field_name}_size"
$upload_file_size;

            upload_pass_form_field "^submit$|^description$";
        }

        # Pass altered request body to a backend
        location @test {
            proxy_pass   http://localhost:8080;
        }
    }
   server{
     listen  8080;
  }
}

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,185057,185057#msg-185057