[ALUG] KDM Display Manager

Hi I have somehow managed to disable my KDM display manager. Would any of you know the best way to go about getting it back to working order. I can't remember how I managed to disable it, but for the moment, I am forced to use the XDM manager. I run SuSE 9.3, which was working well up until yesterday. Thank you very much- any support would be much appreciated, David Noble, Norwich