:s can't get bukkit to run

hey guys
I'm new to linux, and i just got a VPS yesterday and ran a bog-standard minecraft server for a while. Today, i want to get bukkit up on the server, but i'm having problems running it.
Everything i try to get it running suggested here on the forums comes up with this:

root@ausrpcraft:/minecraft/bukkit# ./server_starter.sh
Exception in thread "main" java.lang.NoClassDefFoundError: org/bukkit/craftbukkit/Main
Caused by: java.lang.ClassNotFoundException: org.bukkit.craftbukkit.Main
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
Could not find the main class: org.bukkit.craftbukkit.Main. Program will exit.

Ive tried some other codes to run it as well.
I'm stuck, any ideas?

 

Post your server_starter.sh file.

 

heres what i've tried
screen -S minecraft java -Xms1024M -Xmx1024M -jar craftbukkit1.jar nogui
java -Xms1024M -Xmx1024M -jar craftbukkit1.jar nogui

then i treid that with standard download file didnt work (yes i renamed the jar to craftbukkit1)