Everything works but and cant drive reverse.

i changed the brake/reverse key but nothing happened.

Where did you install the game to? Also, what key did you remap reverse to? If I remember rightly, S is reserved for sound on/off, so you cannot set up a WASD control system natively, though you can use ini file edits and/or key remapper utilities to get a WASD layout to work.

i installed it on my c: ... i have break/reverse on my down arrow key. and when i change it to normal oer other nothing happens. i can only break and the car dont reverse

Whereabouts on c: only some locations are protected and old games aren't able to write their settings to files within their own folders which can then cause issues. Just want to make sure that isn't the case here.

For me, I use the numpad. Almost the default controls, in fact, but I changed brake/reverse to keypad 5 instead of 2.