This hotfix from PartnerSource should fix the issue:
You can find a bit more information on the partner support forum:
http://social.microsoft.com/Forums/en-US/partnerdynamicsax/thread/23deeb62-197e-4305-ae94-157d18da12b5
Please note that the hotfix description does not mention this issue directly. The description for the hotfix is about access to LedgerTrans...
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