This means either your user name or password was wrong. Make sure you typed in everything correctly.
If you lost your user name you can find it in the macaos enterprise ini file.
If you can't remember your password, fill out the Get Macaos Enterprise form or contact us at support@macaos.com. Your login info will be sent to you by e-mail.
Also if you check the Auto login on program start check box, you won't have to login the next time you start the program.