We had nikah in 2002 in presence of my family
--- is your nikaha held as per muslim rituals?
if so he must have recite this kalma, -
la illah illilaha muhammader rasullulaha.
if so, he is muslim in the eyes of law.
your marriage is valid under mohamedan law.
no other certificate necessary for validiate your marriage.
are you facing any other typical problem arising from your marriage?