DB upgrade script fails

When upgrading CiviCRM 3.0.2 ( under Joomla ) to CiviCRM 3.2 beta2, the script to update the database ( http://www.mygroup.org/administrator/index2.php?option=com_civicrm&task=civicrm/upgrade&reset=1 ) failed with the following screen:

Sorry. A non-recoverable error has occurred.
DB Error: no such table

Database Error Code: Table 'pogernet_jml06.civicrm_contact_type' doesn't exist, 1146

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Error Details:

Array
(
[callback] => Array
(
[0] => CRM_Core_Error
[1] => handle
)

[code] => -18
[message] => DB Error: no such table
[mode] => 16
[debug_info] => SELECT *
FROM civicrm_contact_type

WHERE ( civicrm_contact_type.name = 'Individual' )

[nativecode=1146 ** Table 'pogernet_jml06.civicrm_contact_type' doesn't exist]
[type] => DB_Error
[user_info] => SELECT *
FROM civicrm_contact_type

WHERE ( civicrm_contact_type.name = 'Individual' )

[nativecode=1146 ** Table 'pogernet_jml06.civicrm_contact_type' doesn't exist]
[to_string] => [db_error: message="DB Error: no such table" code=-18 mode=callback callback=CRM_Core_Error::handle prefix="" info="SELECT *
FROM civicrm_contact_type

WHERE ( civicrm_contact_type.name = 'Individual' )

[nativecode=1146 ** Table 'pogernet_jml06.civicrm_contact_type' doesn't exist]"]
)