How do I add a mib to Net-SNMP in linux?

How do I add a mib to Net-SNMP in linux?

I have run out of google searches to try. I have the dell-poweredge mib. I have placed it into /usr/share/snmp/mibs. Then export MIBS=+ALL

Try to get any value in the ".1.3.6.1.4.1.674" range, I get a "Request failed or timed out. No error" from OpManager, or nothing from the snmpget at a command line. Any ideas?

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