Can't race AI on Downloaded tracks?

I've got something weird happening here. I can get to the line with all the other cars , and as soon as we are all supposed to leave the starting grid.....the AI all seem to disappear. Either they retire from the race or they all just automatically go back to their pit area and don't move. This is every DL track so far. Such as Watkins Glen , Blackwood , Laguna Seca , Mid Ohio and a few others?

I have a feeling that it's maybe something I'm doing wrong. But with everything set exactly the same , the races run perfect on the stock tracks that came with he game.

Anyone else have an issue like this?
Not all modded tracks have a fastlane.ini file. Without this file you can't race the AI. The the track is still a WIP then it file will likely come eventually.
It's usually listed in the track info on the first post of the track thread. As a general rule, the cameras.ini and fastlane.ini are the last things to be added as all other aspects of the track normally need to be finalized before they are created.