Register of DSC with MCA

CA JIGNESH (C.A.) (83 Points)

10 June 2011  

Dear Friend, I have just got DIN of one my client. after that i got Digital Sign of him.

Now i want its Digital Signature Certificate to register with MCA portal but it requires all his information including his mother's maiden name. but in DIN 1 form nowhere mentioned and no any details is to be filled up.

so how can i register his DSC with MCA21.

pls reply soon, its urgent..