Problem with new User Field at AdminCP User Manager

[SorentoUltimate]

Hello,

i add a new field at my user table

field name        : takecardate
field type        : int
field length      : 10
field attributes  : unsigned
field null        : false
field default     : 0

at userdata_start plugin i put

$this->validfields['takecardate']  = array(TYPE_UINT, REQ_NO);

at useradmin_edit_column2 plugin i put

print_table_break('', $INNERTABLEWIDTH);
    
print_table_header($vbphrase['takecardate']);
print_time_row($vbphrase['user_takecardate'], 'user[takecardate]', $user['takecardate'], 0);

i go to edit a user, i change the date, i press Save but when i go to see the user data again the date is not saved !!!!

any help on that ?

--------------- Added [DATE]1272303876[/DATE] at [TIME]1272303876[/TIME] ---------------

please i want your help to go on with a new addon for my site...