Is there any way to backup HP 1910 Switch configuration

Hello.
I have some troubles to make DeviceExpert backup configuration of hp 1910 switch. No matter what vendor I've choosed it doesn't work.
To backup running config manually I should login to switch via telnet or ssh, then type command "_cmdline-mode on", type "y" to confirm that and after type password "512900". And only after that manipulations I allowed to run "backup startup-configuration to A.B.C.D <filename>.cfg"

I've tried different combinaion, when added ssh\telnet credentials. When I added 'Enable UserName' and 'Enable Password' and tried to connect to ssh via DE I've got the message:

******************************************************************************
* Copyright (c) 2010-2014 Hewlett-Packard Development Company, L.P. *
* Without the owner's prior written consent, *
* no decompiling or reverse-engineering shall be allowed. *
******************************************************************************
<hostname>_cmdline-mode on
All commands can be displayed and executed. Continue? [Y/N]
<hostname>

Without EnableUser and Password it doesn't type even '_cmdline-mo on'. But anyway it doesn't work. Looks like it don't type confirmation 'y' and password 512900. HP Comware Platform Software