Yetishare PHP File Sharing Fix Problem

Hello, My website [login to view URL] use the core file sharing script from [login to view URL] and we face some problem about download manager support for free user . This's the problem 1. When user visit the countdown page and click on free download button then after the countdown was finish , user must to click on download button again . The download manger will error something like in the image (attachment01). 2. When user visit the countdown page but not click on free download button then they refresh the page immediately . The script will allow them to download without any waiting ( I've find in the code and it seem because of the session ) So what I want is - All of free user and non login user must to visit delay (countdown) page . - Download manager support for all of free user and non login user but can't resume , allow only 1 connection and limit speed ( the speed limit options is in admin panel . currently it fix at 200KBps ) Payment Term - I'm ok with 100% milestone but I will not release any part of milestone until project was finish