We are glad that you are having great time with the RadImageEditor!
property can be set only with image, located in folder, that is accessible from your application, as stated in the help documentation on the matter
. Indeed, you won't be able to reference files from another server because you don't have the necessary permissions for that.
the Telerik team
Register for the Q2 2011 What's New Webinar Week. Mark your calendar for the week starting July 18th and book your seat for a walk through of all the exciting stuff we will ship with the new release!