HP ProLiant DL380 G5 and ESXi 5.5

It works fine on an IBM with ESXi 4.1 but it doesn’t work on a HP ProLiant DL380 G5 with ESXi 5.5.
Enabling verbose mode it waits forever at VMware_Controller:

…
20131227 06:42:09 Element Name = Fan 1
20131227 06:42:09 Element Op Status = 2
20131227 06:42:09 Check classe OMC_PowerSupply
20131227 06:42:09 Element Name = Power Supply 1
20131227 06:42:09 Element Op Status = 2
20131227 06:42:09 Element Name = Power Supply 2
20131227 06:42:09 Element Op Status = 0
20131227 06:42:09 Check classe VMware_StorageExtent
20131227 06:42:10 Check classe VMware_Controller

Any idea why? Thanks

Daniel