X-Image-URL display trouble ...

Dear List,

	I know this stuff works pretty well for a long time. However,
	when you don't have a direct access to the Internet (i.e. you
	are behind a proxy server) then it does not work :-(

	I've tried setting up what is required in "Preferences -> Html
	Viewer" which means indicating a "HTTP Proxy Server" and also
	"HTTP Proxy Port", but it always fails when loading the image!
	To bad :-( Any ideas or hints would be appreciated on this
	topic. Thanks in advance for your help, and best regards.

-Émile