Your blades are not starting up, check Status->System Log and Status-> Kernel Log for errors, but it's most likely not enough power on +12V rail from PSU to start mining. Try connecting both PCI-e cables to only one blade (the one with controller, you'll know quickly which one is which - blade without controller will spin fans full blast after about 10 seconds, whereas the one with controller, providing HTTP access will properly control fan speed and produce web access to the interface )

Keep in mind, that in screenshot below the system is up for only 25 seconds, that's not enough time for blades/chips to start mining.

And just as a side note, using the same pool for all three entries will not offer any load balancing or fail over.