INFO: sm: The root user cannot start the HP Service Manager system.

after install service manager, and try to configure it in the linux env, backend database using postgresql, and i have try to login thru command line, it's ok, should be connect to thru service manager, but i got error as below:

INFO: sm: The root user cannot start the HP Service Manager system.,

can anyone could advise on this ? i install service manager as "root", and the the postgresql user is "postgres"