Krrish

Since I had check engine light on my dashboard for a week now, i ordered ODB2 from Amazon, now the thing is it won’t actually connect to my ECU and I don’t know why. I have tried all the protocols, also I have tried other apps too( apps other than torque pro like car doctor). My car is a 2009 Chevrolet Aveo. It is compatible according to http://obd2-elm327.com , also it has an ODB2 port. So whats going wrong? Should I deem that it won’t work with my car and return the adaptor?