This is quite easy. In order to start or stop a service in Windows 2003:
=> Click on Start
=> Select Admin Tools
=> Select Services
Now you can view the service names, description, status etc.
Task: To start or stop service
=> Select service name
=> Right click on a service name
=> Select Properties.
=> Now select Start or stop per your requirements.
Task: Make sure service start on Window server boot
To start a service when windows server boots, select service name and set type to automatic.
The Windows Event viewer error logs always contain more information about why service failed to start.