after single game ended I push esc-key and click option. console says me "Replay is not being recorded" .. T.T
How can I record my single play....

Goto OPTIONS > GAME and where it lists the options for Multiplayer and Singleplayer replay saves, set them to [Enabled - Manual Save].

It should work all the time in Multiplayer, however in Singleplayer it only works certain times.

The reason you get this message is probably because you started a race/practice, but then pit in/out a few times. Doing that will cause the replay to suddenly not 'record' for some reason

If you want to get a full replay of your singleplayer driving, make sure you RESTART the race in between replays.

GAME OPTION of replay saving was disabled... Thankyou for your advice ~~