Update dsc in mca site

DSC OF ONE OF A DIRECTOR OF A PRIVATE LIMITED COMPANY HAS EXPIRED , AND I HAD TO UPDATE THAT DSC WHAT IS THE STEPS TO UPDATE DSC, FURTHER IN CASE OF REGISTER OF DSC , ITS ASKING MOTHERS MAIDEN NAME WHAT SHALL I PUT IN THAT I HAD TRIED LOT , PUTTING MOTHER NAME BEFORE MARRIAGE BUT ITS NOT TAKING.