Help! Please!

We are working on an initial installation for a production environment.
We have selected an Enterprise deployment with the following

DB = Oracle 10g on a physical Win2k3 server
All other components (Manager, Collection, Task, Web Console) on a
Win2k3 server virtualized on an ESX host.

We can not install the Web Console. It errors during the installation
with the following Error: "Apache TomCat service is unavailable."

The install does appear to copy a couple more files but the Apache
Tomcat and Webconsole Updater Service services are not installed. A
reboot does not resolve the issue.