[Zope] using a method as the img name

[Trevor Toenjes]

I created a method/document called header.gif that will be called from a
remote, non-zope server.

just calling the URL http://zope/images/header.gif renders the Method and
variable image correctly.
However, including <img src="http://zope/images/header.gif"> in the remote
HTML page does not.
Why doesnt this just act like a Zope object and render the img?
What is the solution?

TIA,
Trevor