Device Expert. Backup failure. Enable Change Detection failure.

Hi,

I'm using Device Expert 30-day trail and trying to backup my ASA 5510. So I provided credentials and entered into the enable login mode successfully. But when I hit backup button in Actions menu I'm getting - Failure due to not supported commands. Also it says that operation timed out during transfer.
Is there any way to increase time out period in Device Expert or may be change the commands for configuration backup?

Also there is another issue. If I make any configuration changes the Changed by line is Not Available. And when I try to turn on Enable Change Detection it always fails and status stays Disabled.

What am I doing wrong?

on ASA 5510 I have

logging enable
logging timestamp
logging standby
logging trap informational
logging asdm informational

snmp-server host inside xxx.xxx.xxx.xxx poll community ***** version 2c
no snmp-server location
no snmp-server contact
snmp-server community *****

asa-5510# sh log
Syslog logging: enabled
    Facility: 20
    Timestamp logging: enabled
    Standby logging: enabled
    Debug-trace logging: disabled
    Console logging: disabled
    Monitor logging: disabled
    Buffer logging: disabled
    Trap logging: level informational, facility 20, 88657204 messages logged
        Logging to inside xxx.xxx.xxx.xxx
    History logging: disabled
    Device ID: disabled
    Mail logging: disabled
    ASDM logging: level informational, 88657205 messages logged

Please provide advice or instructions.

Thank you.