[Setup] Migration from Plone 2.1.2. to Plone 2.5.3

[Zanotti Michele]

Hi all,
Trying plone update from 2.1.2 to 2.5.3 (and from Zope 2.8.5 to Zope
2.8.9 on windows) i obtain this error:

Result of the attempt...

Dry run selected. 
Starting the migration from version: 2.1.2 
Attempting to upgrade from: 2.1.2 
Removed vcXMLRPC.js 
Added icons for copy, cut, paste and delete 
Upgrade to: 2.1.3-rc1, completed 
Attempting to upgrade from: 2.1.3-rc1 
Upgrade to: 2.1.3, completed 
Attempting to upgrade from: 2.1.3 
Upgrade to: 2.1.4-rc1, completed 
Attempting to upgrade from: 2.1.4-rc1 
Upgrade to: 2.1.4, completed 
Attempting to upgrade from: 2.1.4 
Installed CMFPlacefulWorkflow. 
Upgrade to: 2.5-alpha1, completed 
Attempting to upgrade from: 2.5-alpha1 
Upgrade aborted 
Error type: cPickle.PicklingError 
Error value: Can't pickle <class 'App.Product.atoi'>: attribute lookup
App.Product.atoi failed 
File "C:\Programmi\Plone 2\Data\Products\CMFPlone\MigrationTool.py",
line 308, in upgrade newv, msgs = self._upgrade(newv) 
File "C:\Programmi\Plone 2\Data\Products\CMFPlone\MigrationTool.py",
line 414, in _upgrade res = function(self.aq_parent) 
File "C:\Programmi\Plone
2\Data\Products\CMFPlone\migrations\v2_5\alphas.py", line 24, in
alpha1_alpha2 installPlonePAS(portal, out) 
File "C:\Programmi\Plone
2\Data\Products\CMFPlone\migrations\v2_5\alphas.py", line 43, in
installPlonePAS installOrReinstallProduct(portal, 'PlonePAS', out) 
File "C:\Programmi\Plone
2\Data\Products\CMFPlone\migrations\migration_util.py", line 82, in
installOrReinstallProduct qi.installProduct(product_name) 
File "C:\Programmi\Plone
2\Data\Products\CMFQuickInstallerTool\QuickInstallerTool.py", line 333,
in installProduct res=install(portal) 
File "C:\Programmi\Plone
2\Zope\lib\python\Products\ExternalMethod\ExternalMethod.py", line 225,
in __call__ try: return f(*args, **kw) 
File "C:\Programmi\Plone
2\Data\Products\PlonePAS\Extensions\Install.py", line 848, in install
migrate_root_uf(self, out) 
File "C:\Programmi\Plone
2\Data\Products\PlonePAS\Extensions\Install.py", line 703, in
migrate_root_uf replace_acl_users(parent, out) 
File "C:\Programmi\Plone
2\Data\Products\PluggableAuthService\Extensions\upgrade.py", line 196,
in replace_acl_users _upgradeLocalRoleAssignments(self, RESPONSE) 
File "C:\Programmi\Plone
2\Data\Products\PluggableAuthService\Extensions\upgrade.py", line 188,
in _upgradeLocalRoleAssignments descend(self.acl_users, self) 
File "C:\Programmi\Plone
2\Data\Products\PluggableAuthService\Extensions\upgrade.py", line 180,
in descend descend(user_folder, o) 
File "C:\Programmi\Plone
2\Data\Products\PluggableAuthService\Extensions\upgrade.py", line 180,
in descend descend(user_folder, o) 
File "C:\Programmi\Plone
2\Data\Products\PluggableAuthService\Extensions\upgrade.py", line 180,
in descend descend(user_folder, o) 
File "C:\Programmi\Plone
2\Data\Products\PluggableAuthService\Extensions\upgrade.py", line 180,
in descend descend(user_folder, o) 
File "C:\Programmi\Plone
2\Data\Products\PluggableAuthService\Extensions\upgrade.py", line 180,
in descend descend(user_folder, o) 
File "C:\Programmi\Plone
2\Data\Products\PluggableAuthService\Extensions\upgrade.py", line 180,
in descend descend(user_folder, o) 
File "C:\Programmi\Plone
2\Data\Products\PluggableAuthService\Extensions\upgrade.py", line 174,
in descend transaction.savepoint(True) 
File "C:\Programmi\Plone 2\Zope\lib\python\transaction\_manager.py",
line 90, in savepoint return self.get().savepoint(optimistic) 
File "C:\Programmi\Plone 2\Zope\lib\python\transaction\_transaction.py",
line 297, in savepoint self._saveCommitishError() # reraises! 
File "C:\Programmi\Plone 2\Zope\lib\python\transaction\_transaction.py",
line 294, in savepoint savepoint = Savepoint(self, optimistic,
*self._resources) 
File "C:\Programmi\Plone 2\Zope\lib\python\transaction\_transaction.py",
line 657, in __init__ savepoint = savepoint() 
File "C:\Programmi\Plone 2\Zope\lib\python\ZODB\Connection.py", line
1032, in savepoint self._commit(None) 
File "C:\Programmi\Plone 2\Zope\lib\python\ZODB\Connection.py", line
503, in _commit self._store_objects(ObjectWriter(obj), transaction) 
File "C:\Programmi\Plone 2\Zope\lib\python\ZODB\Connection.py", line
525, in _store_objects p = writer.serialize(obj) # This calls
__getstate__ of obj 
File "C:\Programmi\Plone 2\Zope\lib\python\ZODB\serialize.py", line 330,
in serialize return self._dump(meta, obj.__getstate__()) 
File "C:\Programmi\Plone 2\Zope\lib\python\ZODB\serialize.py", line 339,
in _dump self._p.dump(state) 
End of upgrade path, migration has finished 
The upgrade path did NOT reach current version 
Migration has failed 
Dry run selected, transaction aborted

Not help from Google. Has anyone suggestions?
Thank you
Michele