loggin in via LDAP causes error

users that are authenticaed through drupal's LDAP module generate an error on login. (see below). If you refresh the page the user is logged in. It appears that it has something to do with the civiCRM profile for the user maybe? when i goto the my account >> edit >> CiviCRM name and address no form shows.

> drupal version 4.6.3
>php5
>LDAP cvs module

error

CRM_Core_Error Object
(
[_errors] => Array
(
[0] => Array
(
[code] => 8000
[params] => Array
(
[0] =>
)

[package] => CRM
[level] => Fatal
[time] => 1126271765.9177
[context] => Array
(
[file] => /home/web/production/modules/civicrm/api/utils.php
[line] => 42
[function] => _crm_error
)

[message] => Required fields not found for Individual first_name
)

)

[_errorsByLevel] => Array
(
[Fatal] => Array
(
[0] => Array
(
[code] => 8000
[params] => Array
(
[0] =>
)

[package] => CRM
[level] => Fatal
[time] => 1126271765.9177
[context] => Array
(
[file] => /home/web/production/modules/civicrm/api/utils.php
[line] => 42
[function] => _crm_error
)

[message] => Required fields not found for Individual first_name
)

)

)

[_package] => CRM
[_compat] =>
[_msgCallback] => Array
(
[0] => CRM_Core_Error Object
RECURSION
[1] => getErrorMessage
)

[_contextCallback] => Array
(
[0] => CRM_Core_Error Object
RECURSION
[1] => getFileLine
)

[_errorCallback] => Array
(
)

[_logger] => Log_display Object
(
[_error_prepend] =>
[_error_append] =>
[_opened] =>
[_id] => 98293db8f2b0f91e80e7af9924c1deee
[_ident] =>
[_priority] => 6
[_mask] => 255
[_listeners] => Array
(
)

)

[_errorMsgs] => Array
(
)

)