Contact DiegoNet support to have the directory removed. You may be uploading your files incorrectly. To create multiple FTP accounts, use the online tool, available from your account control panel. Each FTP account can be restricted to a particular directory, or your whole site. DiegoNet does not support password-only access restriction.
Web authentication requires the use of both a username and a password to logon.
In most instances where access restriction is desired for large numbers of clients, a separate username and password are not required for each client. For example, a monthly subscription-only publication could assign a unique username and password to each of its readers, but this would be prohibitively inefficient. It is not possible to obtain the password used to login. This is a webserver limitation.