first of all please enable your progress bar
make this change needed for progress bar enable
go to include\settings\upload.php

Code:
<?php

# List of allowed file Types

$file_types = array("flv","swf","3gp","mp4","mov","asf","mpg","avi","mpeg","wmv","rm","dat","divx");

$use_upload_progress_bar = 1;
enable progress bar

Code:
$use_upload_progress_bar = 1;
disble progress bar change 1 into 0

Code:
$use_upload_progress_bar = 0;