SNMP: Empty Varbinds Returned ?

SNMP: Empty Varbinds Returned ?

Hi,
 
On one of my servers, I'm having trouble getting SNMP values. Some respond correctly, but for most I'm getting:
 
Request failed or timed out. Error Sending PDU. Empty Varbinds Returned

Anybody know how to fix this?
 
thanks 

                  New to ADSelfService Plus?