SNMP not working on one specific HP ILO

Hi, I am absolute newbie to Checkmk.
I used Observium before, but I wanted a little more indepth.
My iLO4 SNMP works fine with other SNMP apps, but not with Checkmk.
I even reset the iLO and Checkmk and one reinstall.
Also, I know this should be in another thread, but if I use vmware agent instead of SNMP on ESXi, the Checkmk server stopps the agents on itself and other machines.