Your account type is a free account. Please make sure you logon to your account to play the file.
If you want to create a static link, you must be a Paid member (or True Member if you have a real private domain company email address). To publish a folder, you can simply select a folder and click on the Publish button. Once a folder is published, you can directly link it or the files in it with the "Publish URL". You can also simply copy files to the \wwwhome folder. Files in \wwwhome folder can be accessed with the following URL: