Do you have another key to try? Try to put the key in the ON position without starting the engine. see if you have the green key symbol. When you installed the lock barrel did you removed the battery terminal?
How would I go about doing a hard reset? I't sounds like this could be the problem.You might have triggered the anti-theft or immobilizer. You should have removed the battery terminal. But its done. You might need to do a hard reset. It might work.
I tried what you suggested today but unfortunately it didnt work , so I'm still scratching my head over this one.Sorry for the late reply. Life is so busy. The immobilizer error will not show up on the OBD2 scanner. Remove both battery terminals. Without touching the battery posts, ONLY the 2 main Terminals touch them together for 1 minute. Be sure you do this properly. If you want to be safe you can take out the battery temporarily. I hope this helps. Let me know.