Issues when trying to use custom dm (bad cm_change_dm_connection)

Hello!

I am facing issues when trying to use custom dm. Custom dm uses database 0.0.3.3. How can I get cm to send some opcode to custom dm instead of default dm? Dm_pointer in cm pin.conf for custom dm is already set. If I set database of poid to 0.0.3.3 manually, I get this error in cm pinlog:

bad cm_change_dm_connection, new db=196611(0.0.3.3), current db=1(0.0.0.1), err=37(PIN_ERR_TRANS_ALREADY_OPEN), errno=11(Resource temporarily unavailable)

What should I do to make it work? Open new context and new connection? A sample that I've been looking into does not seem to do that.