This one was resolved by adding the SNMP Feature to the server. There are still problems with PROXY though.  I've never before needed any PROXY until installing OMSA and I really shouldn't need one now since LOCALHOST is the only target of my OMSA control panel.
When I was running SBS 2003 32 bit, I had OMSA 6.4 to help manage my PERC 6/i & RAID-5 Array. On the same hardware, now running Win Server 2008 R2 (64-bit), I've tried installing various recommended OMSA versions and each time I install, my network access goes away.  I don't understand why. My needs are really modest.  I don't need/want remote access.  I have no other servers to manage.  I just want to be able to manage my own single server's PERC 6/i & Drives. I'm really lost in the maze of "documentation". Can anyone please point the way here? Thanks...
OMSA 7.4 on PET300, 2008 R2 64 Loses Network Access