Save option of Schema Editor Grayed out?

I opened the patient.dtd, changed the Collection name to Hospital, and tried to save the schema. However, the option is grayed out. The option is available.

Is this a limitation of the Starter Kit?
Is this because my configuration isn’t properly established? (web server config not proper due to multiple web servers on machine).

If this is because the config isn’t correct, I can rectify this next week with a new machine and a re-install.


I just discovered that the “Save as XML” option saves the schema as a .xml file.
Then the option is activated.
The confusion is the implication that “Save” and “Save as XML” are two different functions.