Trying to export from Plone 2.1.3 and import to 2.5.1

I think I’ve installed all the correct Products into my Plone 2.5.1 instance to match the 2.1.3 I’m exporting from, however when I try to import my .zexp of my 2.1.3 instance, it doesn̵7;t like me. Below is the trace info, if anything jumps out your thoughs would be most appreciated, or if I need to go about this a different way….

Thanks,

Mike

Traceback (innermost last):

  Module ZPublisher.Publish, line 115, in publish

  Module ZPublisher.mapply, line 88, in mapply

  Module ZPublisher.Publish, line 41, in call_object

  Module OFS.ObjectManager, line 588, in manage_importObject

  Module OFS.ObjectManager, line 605, in _importObjectFromFile

  Module ZODB.ExportImport, line 75, in importFile

  Module transaction._transaction, line 295, in savepoint

  Module transaction._transaction, line 292, in savepoint

  Module transaction._transaction, line 675, in __init__

  Module ZODB.Connection, line 1012, in savepoint

  Module ZODB.Connection, line 493, in _commit

  Module ZODB.ExportImport, line 144, in _importDuringCommit

  Module copy_reg, line 48, in _reconstructor

TypeError: ('object.__new__(Index) is not safe, use Persistence.Persistent.__new__()', <function _reconstructor at 0xb7f33dbc>, (<class 'textindexng.index.Index'>, <type 'object