Adding DataDomain system to DPA

Hi All,

I am trying to add a DataDomain system to a new install DPA server.   I follow below step from the DPA Admin Guide. 

SNMP must be enabled on the EMC Data Domain backup appliance. You also need to

set the community string. This can be done from the command line.

To enable SNMP on the EMC Data Domain appliance:

1. Log on to the EMC Data Domain appliance console using the sysadmin account.

2. Enter the following commands:

snmp add ro-community

yes

snmp enable

After adding the DataDomain system, there was nothing show on the DPA.  When i try to test the DataDomain Configuration, i just get aapiSNMPOpen() failed error.

When i add the DataDomain system to DPA, seems there was no where to add the address of my DataDomain.  Is it normal?

Do anyone have items?