SNMP strings and parameters configured have been verified to be correct.
IP Access list has already permit the device to send and receive trap from LMS Server.
I am now suspecting the DCR is not able to receive OID of the chassis as CSDiscovery.log (posted in the text file attached) in debugging modeshows that the sys OID is null when the process is called.
However, I am able to poll the sys OID using a MIB Browser running on LMS Server. So what could the reason that DCR is not able to get the sys object ID?