'explains' in Problem definition not adding event to 'Impacts' tab

Hi all,

I've added a model class to the IP repository and everything is working as per the requirement.

But here is what is not working:

problem Server_Down

     => Server_Down_P, Service_Down_P,

     Service_Down_P explains;

this problem is triggers when server and all related services are Down. But the resulting notification only has 'codebook' tab (with Server and Service instance info) but no 'Impacts' tab.

Am'I missing something on config side?

I've tried exporting the underlying problems and events.

Thanks,