Running Several Instance of Mincrafts Server as a Service on One Computer

We have one computer that acts as our server. We wanted to run several instances of the minecraft sever: classic, standard beta, and beta with mods.

I followed the instructions (http://windowsmasher.wordpress.com/2010/12/02/how-to-install-a-minecraft-server/) and creating three seperate folders:

C:\Minecraft-Servers\Classic
C:\Minecraft-Servers\Beta
C:\Minecraft-Servers\BetaMod

Three services did get created but we were only able to connect to one of the servers.

Here is what I did to fix the issue. You actually might not need all of them but this does work:
1. Gave each minecraft server a separate port in the minecraft server.properties file
server-port=25565

2. Modified the wrapper.config for yajsw to
A. turn off the system tray: wrapper.tray = false
B. run minecraft server with noui
# Java Additional Parameters
wrapper.java.additional.1=-Xincgc
wrapper.java.additional.2=-Xmx1024M
wrapper.java.additional.3=-Xms1024M

# Adds an environment to the application
#wrapper.app.env.=
wrapper.app.parameter.1 = -classpath
wrapper.app.parameter.2 =C:\\Minecraft-Servers\\Beta\\minecraft_server.jar
wrapper.app.parameter.0 =nogui


# Java Classpath (include wrapper.jar)  Add class path elements as
#  needed starting from 1
# YAJSW: all libs required by YAJSW are in the manifest of the wrapper.jar -> only classpath of your application is required
wrapper.java.classpath.1=C:\\Minecraft-Servers\\Beta\\minecraft_server.jar

# Java Application main class
wrapper.java.app.mainclass=
# or jar file
wrapper.java.app.jar=C:\\Minecraft-Servers\\Beta\\minecraft_server.jar