runAsUserId Error workflow

Hi all.

when i try to start a workflow from a Sharepoint zone with authentication mode = forms, i get an error on starting.

If i start it from the windows authentication zone, no problem with the workflow, it works fine.

Here's the log:

RunWorkflow: System.ArgumentException: Value does not fall within the expected range. at Microsoft.SharePoint.Workflow.SPWorkflowActivationProperties..ctor(SPWorkflow workflow, Int32 runAsUserId, String associationData, String initiationData) at Microsoft.SharePoint.Workflow.SPWinOEWSSService.MakeActivation(SPWorkflow workflow, SPWorkflowEvent e) at Microsoft.SharePoint.Workflow.SPWinOeEngine.RunWorkflow(Guid trackingId, SPWorkflowHostService host, SPWorkflow workflow, Collection`1 events, TimeSpan timeOut) at Microsoft.SharePoint.Workflow.SPWorkflowManager.RunWorkflowElev(SPWorkflow originalWorkflow, SPWorkflow workflow, Collection`1 events, SPRunWorkflowOptions runOptions)

?Does anybody know how to fix it?

Thanks.

[1020 byte] By [Sergio_FT] at [2008-1-1]
# 1
Did you find a solution to this problem? I'm not using Forms authentication, but I am receiving the same error with my workflows.
Simone at 2007-9-12 > top of Msdn Tech,SharePoint Products and Technologies,SharePoint - Workflow...

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