Ethernet IP Configuration

I have a TP-Link power line adapter and I am trying to connect to a private network. I am able to connect wirelessly and it works fine. However, with Ethernet I get an error that states, "Ethernet does not have a valid IP Configuration ". Therefore, it is an unidentified network. I ensured all the lights were flashing on the power line adapters. I tried checking the properties of the adapters settings , however nothing seems to work for me.
Any suggestions or procedures on how I can ensure the Ethernet recogonizes the private network?

 

Hi esd, Welcome to WindowsBBS. I think it may help if you give us some more detail. What OS are you operating? Cheers Neil.