Folks are going to need more than that if you would like someone to help you... Also you should try the 'search' function in the forum and read as much information as possible and you might just solve the problem yourself.
It could be something as simple as a button being pressed below the radio that deactivated the system (at least I believe that is how the DSC worked on my E46), wiring problem, brake module problem, etc.
Have you tried anything to make the light turn of? Restarted the car? When did the light come on... were you driving... were you parked... etc.
This type of info may help someone that has had a similar problem to yours lead you to a solution. Good Luck!
2004 BMW 330Ci Convertible