new to cocoon... trouble creating sandbox

[J. Norment]

Running XP/Tomcat 4.1.18/cocoon 2.0.4 ...   Tried to create webapps/cocoon-dev by copying webapps/cocoon to webapps/cocoon-dev and copying sitemap.xmap and WEB-INF.   ( Doing this at the suggestion of a tutorial. )   put helloworld.xml and helloworld.xsp into cocoon-dev/tutorial.   localhost/cocoon-dev/helloworld.xml produces an error: resource-not-found cocoon-dev/helloworld.xml .   Can you tell from that information what I'm doing incorrectly?   Thanks.