DTD is prohibited

[jimlynnjulian]

Using Notepad++ with xmltools syntax check on.
I place a recommended DTD in the same folder as an xml file but when I open the xml file in notepad, after a few seconds, I get a warning message " DTD is prohibited." Online xml validators passed the xml file. The dtd was not tested.
These are the firat few lines:

`?xml version="1.0"?

!DOCTYPE movie SYSTEM "cinemagoer.dtd"`

note: the original url given for the dtd is no longer active.
I omitted the angle brackets due to display problems with this editor.