Solved

Using keyboard

Hi, I know you can use the keyboard to control both drivers and to make changes to push and kers, but I can't seem to be able to do that anymore. 

It's only in a couple of races per season that I still can control kers, and that's it. 

Is there something I need to enable or something?

Many thanks

Make sure you haven't got the chat tab active. This is the most common reason for the keyboard shortcuts to not work.
If you want to monitor chat (without participating) close the chat window then press the "H" key on your keyboard.

thank you, I'll try that, I always have the chat window open so it's likely that is the problem. I'll let you know

That's what it was, thank you!