When asking for support please try to explain your error what the issue is. Really when someone says I cant upload that does give me much to work on. If you describe the process and give exact details what happens I might be able to assist however just a note you need to have access to edit php settings which it looks like you have and your server's PHP needs to be setup to allow large file uploads. Try this
Those are the 4 I know of to make your server allow large uploads and you may need to restart the server to load any changes. Uploading large files totally depends on your server setup and not our software.