OME - Upgrade ESX server

Hello,

I have an ESX server that was added in OME using ESXi Host - SNMP + WS-MAN.

I want to upgrade disk firmware for it using OME but I get the next error:

Then I thought to add it in OME using  Server with OMSA - SNMP.

I mention that OMSA was previously installed and SNMP also configured, but the server is finally discovered as "Unclassified".

Update Advanced Settings:

So, is there a way to solve it?

Thanks in advance and kind regards,

Augustin.