sorry maybe I made my question in a wrong way let me explain.
I had a server named SERVER1 with Windows 2008 and SEPM 12.1.4. I created another server named SERVER2 with Windows 2012 and installed SEPM 12.1.4, both servers under the same site.
After checked that, I deleted SERVER1 from Admin -> Servers and renamed SERVER2 Aas SERVER1 (same IP too) in order to not lose the connections with the clients. After that I upgraded to SEPM 12.1.6 and checked some clients confirming that they were reponting to the SEPM. Success. But when I tried to log into SEPM, I got the error.
We migrated the database to Native SQL2012. I tried to login to the same server, another DB (testing). Success
Can't understand why I can't login.
Regards