The Data Collection task could not find any data to collect

Hi

I've 2 new ProLiant DL380p Gen8, well recognize, i receive alert, see attachement.. 

but each weeks i stuill receive this following error :

Event Name: Data Collection found no data

URL: https://xxxx.xxx.xx:2381/

Event originator: xxxx

Event Severity: Minor

Event received: 22-Feb-2014, 00:10:42

Event description: The Data Collection task could not find any data to collect. The target system may not have been running any supported instrumentation protocol, such as SNMP, WBEM or DMI.