I've set up integration between DAM and ePO. ePO could get events but not DBMS list. Database Security - DBMS Status Import task works, the result is Database Security DBMS Status Import (0 DBMS Statuses imported.)
I'm entirely sure what you are trying to do:
01 - Running a separate server with DAM and importing into EPO?
02 - Running ePO with the fully integrated version of DAM?
If option 02, i found during my initial testing there was an issue with the Agent having duplicate GUIDS and some additional issue with the Agent communication. Support was working on a fix, provided me with a temporary solution. I would suggest checking the Rogue Systems - initially our DBMS never showed up, but was listed as a Rogue device. Once we found it and added to system tree it was ok.