The problem is server related, refer to this
KB article for the configuration that will fix the problem. When Sitefinity tries to publish a page the page passes trough workflow which must pass trough the server where the site is currently hosted.
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items