Brocade not seeing WWN's

I have the following scenario: IBM virtual bladecenter with build in Cisco MDS switch as NPV. This Cisco NPV switch is connected with NP port to Cisco MDS Director where I can see NPIV HBA's of different blades. The problem comes in where the  Cisco NPV switch is also connected to a Brocade Director where NPIV is enabled, but the brocade can only see the port PWWN and not the underlying NPIV HBA's.

Please help if this make sense.