problem with sun roof on 2008 bmw 328i

The sunroof has an initializing process. Press and hold the sunroof in the "lift" position the roof will go up, keep holding for about 15sec and then the roof will move another half inch or so up Keep holding the switch in the lift position, the roof will then close, then slide open all the way, and then close again The process is then complete Do not release the button untill the process is completely finished, else you would have to start over again