powermt commands report "No device(s) found" for Hitachi array under SLES9

I have a customer site where we're adding three new BladeCenters where we already have three running.  All are connecting to Hitachi SANs.  When I try to configure PowerPath, I get the error "No device(s) found".  I also see that "powermt display" reports "Hitach logical device count=0", which I assume is the root of the problem for PowerPath.  These new servers connected to a Hitachi DF600F via Emulex HBA through Brocade switches and are running SLES9SP3.

However, this is from a diskless server thatis already booting from the Hitachi SAN!  I should at least see the boot LUN!  "hwinfo --disk" reports multiple Hitachi disk drives as:

/dev/sda (/dev/sg0)

/dev/sdb (/dev/sg1)

/dev/sdc (/dev/sg2)

/dev/sdd (/dev/sg3)

/dev/sde (/dev/sg4)

/dev/sdf (/dev/sg5)

/dev/sdg (/dev/sg6)

/dev/sdh (/dev/sg7)

We're following the same process we've used successfully in the past - any idea why the Hitachi is not found?

One difference I see is that the three production chassis are connected to "HITACHI OPEN-V" rather than "HITACHI DF600F".  All servers are using PowerPath v4.5.1 - is there a compatibility issue?