I'm glad that you can now see all of the cars in the list when you join the server.
Does the car and track combination work in single player mode?
Do you have logging enabled for both single and multiplayer modes? Adding "trace=2" to the command line parameters field in the Launcher may help you to determine the cause of the issue.
Which version of Windows are you running?
Does the same problem occur when you try to join another one of our servers, or any other server? And does the problem occur with any other car and track combination?
EDIT:
Looks like you have been able to join the server and load the track successfully!
My CTD's was unrelated to the server. Reinstalled my audio drivers (also strange) then everything was ok.