Cannot use ethernet on HP port replicator
 

I previously used the ethernet connection on my HP 3005pr port replicator by installing displaylink drivers on my macbook air, but now I can no longer access the ethernet connection. I can only access wifi. I tried uninstalling and reinstalling displaylink, but no go. Has anyone run into this issue, or does anyone have this working? displaylink.com doesn't explain how to setup ethernet on mac. It only has instructions for windows.