I edited the profile file to include the sex option! But I'm not sure how to add a new field to the databse, might that be why?

My forums have been working fine for about a week! Today I came on and saw 2 new registered members, yet both have no details whatsoever and it says the registration date is 1970!

Any idea what is going on?

http://www.talkflamingo.co.uk/

I've made all the changes seva said, added what starshiner said. Now all I need to do is create the database field right? How do I do that?