[Russell Sobie]

Are you using Assetto Corsa's front end? Content Manager (recommended)? When you say "other modes" do you mean like, single player versus multiplayer/online? Have you tried joining an online server with the same results? If joining an SRS race is the only time that your controls don't work, perhaps record a video of your entire process of starting things up to give us a look? If that's not possible, a distinct list of exactly what you are doing to successfully join a multiplayer race (non-SRS) and still having controls work and exactly what you are doing when trying to join an SRS race. Such as:

1. Start Assetto Corsa
   
2. Click Drive.
   
3. Click Online.
   
4. ...
   

Etc..