Tim:
The Client Pull and Server Push methods both require support from your web browser. Support for these methods will vary depending on the browser you're using, and sometimes will even vary depending on the version of the browser you're using--this depends on the manufacturer of the particular browser.
Do the Server Push examples work?
Tim, you may prefer to request support from National Instruments Technical Support concerning this matter. You can contact National Instruments support via telephone at 1-800-IEEE-488 or via email at http://www.ni.com/ask.
Good Luck,
Chris W
Applications Engineer
National Instruments