It looks like you are trying to download your configs with the login credentials and not SNMP. It looks like youe default login is trying to use Telnet to log in. Either change it to SSH if you block telnet or change the request Configs Using to reflect SNMP. Edit the properties and under NCM properties you will see something like this:
Select the dropdown for Request Configs Using and Select SNMP (or SSH1 of SSH2):
If you select SSH the Transfer Configs using will automagicly change to TFTP:
You can change the Global Settings here:
