Need for Speed THE RUN(game) settings problem.

In this game there is problem in its Settings, for playing the game I changed the Settings according to my condition and played the game. The Game ran according to the settings I just did. Now, I opened the game after 1 hour after of my last play, now what I see is that the Game Setting is automatically changed to its default settings. How can this happen? Please tell me what is the problem and appropriate solution?
