How can I enable the "Publish to SharePoint..." option in SketchFlow?

My MSDN subscription provides Expression Blend 4, but not Ultimate. I received a 60 day trial of SketchFlow which I'm using for evaluation. However the "Publish to SharePoint..." option is disabled. Can anyone tell me how to enable this functionality?

Solution

For future reference to others.

http://social.expression.microsoft.com/Forums/en-US/blend/thread/20deaec5-4762-411b-b111-84d5c8b5fae2

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