[Koha] Unable to add patrons

Kia ora, I have just started using koha and am having trouble adding patrons. Although I am am able to add biblio entries, when I try to add members, the details are not recorded. Upon saving, the membership record is completely blank. I couldn't find an answer to this problem in the old posts or in forums elsewhere. If anyone can help I would be most grateful... Cheers, Paul McBride Youthline Auckland