Getting HTTP Status 404 on tomcat

I installed piwik as described in install section at piwik.org/docs/installation/, means I have tomcat server up and running I unzipped the piwik “latest.zip” at “<tomcat_home_dir>/webapps” which created a folder “piwik”, resatrted tomcat server and when I tried to access piwik through using link “vm.com:8282/piwik/” in Mozilla I get following error:

HTTP Status 404 - /piwik/
type Status report
message /piwik/
description The requested resource (/piwik/) is not available.

One more thing does piwik still does not support PHP 5.1?

Can anyone help me out in this regard I will be thankful to you.

Piwik requires at least php 5.1.3.

However, your Tomcat server may not be able to serve up PHP.