I'm using ver 2002 & you're using 2003, so there might be differences but it could be as simple as setting an option. Try:-
1. Tools
2. Options
3. Select "View" tab
4. In 'Show' options turn on 'Windows in Taskbar'

I've found when something happens that loses my windows setups when resetting all my options this is the one I really need and I can never remember - I spend ages going thru my setup notes to find it.

Hope it helps

Ciao