problemas de registro usuarios en base de datos

[syntex]

Campo Tipo Nulo Predeterminado Comentarios
userid int(10) No
usergroupid smallint(5) No 0
membergroupids char(250) No
displaygroupid smallint(5) No 0
username varchar(100) No
password char(32) No
passworddate date No 0000-00-00
email char(100) No
styleid smallint(5) No 0
parentemail char(50) No
homepage char(100) No
icq char(20) No
aim char(20) No
yahoo char(32) No
msn char(100) No
skype char(32) No
showvbcode smallint(5) No 0
showbirthday smallint(5) No 2
usertitle char(250) No
customtitle smallint(6) No 0
joindate int(10) No 0
daysprune smallint(6) No 0
lastvisit int(10) No 0
lastactivity int(10) No 0
lastpost int(10) No 0
lastpostid int(10) No 0
posts int(10) No 0
reputation int(11) No 10
reputationlevelid int(10) No 1
timezoneoffset char(4) No
pmpopup smallint(6) No 0
avatarid smallint(6) No 0
avatarrevision int(10) No 0
profilepicrevision int(10) No 0
sigpicrevision int(10) No 0
options int(10) No 15
birthday char(10) No
birthday_search date No 0000-00-00
maxposts smallint(6) No -1
startofweek smallint(6) No 1
ipaddress char(15) No
referrerid int(10) No 0
languageid smallint(5) No 0
emailstamp int(10) No 0
threadedmode smallint(5) No 0
autosubscribe smallint(6) No -1
pmtotal smallint(5) No 0
pmunread smallint(5) No 0
salt char(3) No
ipoints int(10) No 0
infractions int(10) No 0
warnings int(10) No 0
infractiongroupids varchar(255) No
infractiongroupid smallint(5) No 0
adminoptions int(10) No 0