Proliant DL380 G4 - Are sensors available?

Hi,

I'm running an ESXi 4.1 U3 on my DL380 G4. Unfortunately i uploaded the non-HP version, so it's a plain system already up and running with some hosts.

I was trying to have some more information about hardware sensor (i.e. hard drive/RAID status, temperature monitoring) directly in vSphere client. So that I installed latest HP bundle for ESXi 4.1 but in my hardware view no sensors appears as in attached image.

I wonder if there is anything special to do or if no sensor is shown as no sensor is present in my hardware.

Thanks in advance