I just installed VWD Express and created a web site and database with all my tables and columns. Next I want to create a database diagram and visually construct my keys and relationships. When I right click "Database Diagrams" in the Database Explorer and select "Add New Diagram" one opens in the main window. The problem occurs when I try to either add tables or save. There don't appear to be any table options available (they are grayed out in the Database Diagram menu). Saving gives me the error message "The operation could not be completed. Unspecified error"
What should I do to be able to create a diagram?