Hi,
If you are moving to a server in the same domain - I suggest using auto mapping. Are you sure that the user being used in the workflow is enabled?
It could be that the user is being assigned a different GUID in the new organisation - which would mean that the workflow is still referencing the old one. If this is the case, unpublish the workflow, re-select the user and publish again.
hth,
scott
Scott Durow
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