You will need to enable presenter view (Slide Show > Set Up Show).
Check this out:
"A Multiple Monitor Tutorial by PowerPoint MVP Chirag Dalal"
http://www.rdpslides.com/pptfaq/FAQ00476.htm

Signature
Shawn Toh (tohlz)
Microsoft Most Valuable Professional (MVP PowerPoint)
Site Updated: Sep 01, 2006
3 Cool Add-Ins Reviews
http://pptheaven.mvps.org
PowerPoint Heaven - The Power to Animate
> Is there a way for me to view my speaker notes on my laptop screen without my
> audience seeing them while projecting the slides on a large screen (in a
> classroom).