It's me again. Firstly I would like to thank you for you last response
I was speaking with my hosting providers, and they said that configuration of output control directives in php.ini is correct. (they also sent me this link: http://meconvert.com/pi.php
I was modyfing your script but only the visual aspects, I didint touch ob_end_flush();, ob_flush(); and flush();.
I have no idea why downloading bar doesn't appear
I even reinstalled the script and the problem still exist in not modified, orginal script.
Any new ideas?