multi pathing with EMC

Hi 

I have   some  clariion  LUNs attached to a few  Solaris 10 x86 machines with multipathing through powerpath  but the multipathing does not seem to be working . Below is the powermt output from one of the servers There was  activity at the  SAN side recently where  the LUNs should have been available through one path but  the LUN simply became unavailable and the  filesystem got unmounted  Any insight is appreciated

# powermt display dev=all

Pseudo name=emcpower2a

CLARiiON ID=APM00114201082

Logical device ID=600601605FE02C002C6011A9BEA3E111 [LUN 17]

state=alive; policy=BasicFailover; priority=0; queued-IOs=0;

Owner: default=SP B, current=SP A       Array failover mode: 4

==============================================================================

--------------- Host ---------------   - Stor -   -- I/O Path --  -- Stats ---

###  HW Path               I/O Paths    Interf.   Mode    State   Q-IOs Errors

==============================================================================

3072 pci@0,0/pci8086,3410@9/pci103c,3261@0/fp@0,0 c1t500601643EA030ECd2s0 SP A4     active  alive       0      0

3072 pci@0,0/pci8086,3410@9/pci103c,3261@0/fp@0,0 c1t500601663EA030ECd2s0 SP A6     active  alive       0      0

3073 pci@0,0/pci8086,3410@9/pci103c,3261@0,1/fp@0,0 c2t5006016C3EA030ECd2s0 SP B4     unlic   alive       0      0

3073 pci@0,0/pci8086,3410@9/pci103c,3261@0,1/fp@0,0 c2t5006016E3EA030ECd2s0 SP B6     unlic   alive       0      0

# powermt check

Warning: license for CLARiiON storage system support is missing or expired.