Filemanager tinymce可写权限

I have a website built with Codeigniter. In that website, I use tinymce to create a news and using filemanager plugin to insert file. But, after migration from local to server, I can't upload to upldoad_dir even I set the permission to the current user (admin). I also changed chmod to 777 but still, I can't upload and make folder from tinymce filemanager plugin. This is the screenshot of my problem.