A strange issue happened while using UnlimtedGB hosting service. When i tried to edit a web page through plesk file manager, it allowed to save the changes.But when i cleared cache and refreshed the web page which i edited, the new contents were not there, ie the changes were not reflected in the website. So I came back to plesk file manager and checked the file which i previously edited, then i could see the change was in the file, but not on website.