snmp issue:Two similar servers returning different output

I am having issue with SNMP OID's . I have two similar servers (hardware and software) Which is Dell server with RHEL 5.3 X86_64. The issue is when I run the SNMPWALK for one server it shows proper data while the other server returns > No Such Instance currently exists at this OID Both have net-snmp version as: 5.3.2.2 OID seems to be custom and only for Dell machines "1.3.6.1.4.1.674" (SNMPv2-SMI::enterprises.674), but both machines are Dell based and follow the same architecture and components. Can someone trace on cause of this issue?