Automatic log in with Windows Server 2003

Our Windows Server 2003 is always running but it is set up to ask password to access the system.
I have created a VBS script to auto log in by setting the user name and password in the registry. But I have to reboot the computer to log in. I am looking for a log in command to log in automatically when the VBS is running or forward the password to the computer to skip the login box. If anybody knows the solution to solving this, please help me.
I will be thankful for all your help.
