Elm 327 obd2 connection problem

Elm 327 obd2 device is connecting but there is an ecu problem. Can you help me? My 2003 model 2.0 diesel 307 sw car.

sir i have 206 sw 1.4 hdi too. I bought the same device. I connect to the device with the phone, but it cannot connect to the brain, I could not understand. did you solve the problem, the program sees the device, but it says it is looking for the protocol, finally it says it could not connect to the brain, it stays that way.