AAA/Identity/Nac :: ACS 4.2 Backup Through Console / CLI

Due to some wrong access policy applied in the administration control settings. GUI access is not functioning. So we need to take a backup thru CLI mode using FTP server. I have tried using the backup command in the console & taken the backup using the following steps. But the backup file is less than 1kb. I need the exact Db backup to be taken.
 
Step 1 Log in to the ACS SE. For more information, see Logging In to the Solution Engine from a Serial Console.Step 2 At the system prompt, enter backup and press Enter.Tip You can enter the following parameters after the command or in response to subsequent prompts: [server] [username] [filepath]Step 3 At the Enter FTP Server Hostname or IP Address: prompt, enter the FTP server IP address or hostname, and press Enter.Step 4 At the Enter FTP Server Directory: prompt, enter the FTP server directory pathname, and press Enter.Step 5 At the Enter FTP Server Username: prompt, enter the FTP server username and. press Enter.Step 6 At the Enter FTP Server Password: prompt, enter the FTP server password and, press Enter.Step 7 At the File: prompt, enter the name that you want to give the backup file, and press Enter.Step 8 At the Encrypt Backup file? <Y or N>: prompt, enter Y to encrypt the backup file or N not to encrypt it, and press Enter.Caution This procedure interrupts the use of the ACS SE for AAA services.Step 9 If you entered Y to encrypt the backup file, at the Encryption Password: prompt, enter a password and then press Enter.Result: The console displays:Backing up now . . .

All running services will be stopped and restarted automatically.Are you sure you want to proceed? <Y or N>Step 10 To proceed, enter Y and press Enter.