REGARDING CHANGING OF NAME ON SOCIETY SHARE CERTIFICATE

MY FATHER WAS DIED ON 1993 & THE SOCIETY SHARE CERTIFICATE IS HAVING WITH HIS NAME. LATER, MY MOTHER WAS THE MEMBER OF SOCIETY BUT SHE NOT CHANGED THE NAME ON SHARE CERTIFICATE. SHE DIED ON YEAR 2014. OUR PROPERTY IS STILL ON THE NAME WITH MY FATHER. I HAVE TWO SISTERS. AFTER MY MOTHERS DEATH I BECAME THE HOUSING SOCIETY MEMBER & I AM ASKING THE SOCIETY AUTHORITIES TO ADD MY NAME ON THE SHARE CERTIFICATE BUT THEY NOT ACCEPTING IT. THEY ARE SAYING THAT ADD YOUR NAME ON PROPERTY CARD FIRST & THEN ONLY WE CAN ADD YOUR NAME IN SOCIETY SHARE CERTIFICATE... PLEASE GUIDE.