RSBOT PROBLEM , need help

Is the problem in paintlistener ? or java ? IF ANYONE CAN HELP ME OUT WITH THIS ONE , I TRY TO HELP YOU OUT WITH YOuR PROBLEM !
so heres what i do : i open rsbot , wait for it to load rs , now , i press run script , and then freezes for 3 sec and then under the rs theres a info tab there comes this error:


EXCEPTION Unhandled exception in thread AWT-EventQueue-0; java.lang.NoClassDeffFoundError
at java.lang.classloader.defineclass1 (native method)
at java.lang.classloader.defineclasscond (unknown source)
at java.lang.classloader.defineclass (unknown source)
at java.lang.classloader.defineclass (unknown source)
at org.rsbot.util.uncachedClassLoader.loadClass(uncac hedClassloader.java:36)
at org.rsbot.gui.ScriptSelector.loadScript(ScriptSele ctor.java:149)

Caused by: java.lang.ClassNotFoundException: com.speljohan.rsbot.event.listeners.paintlistener
at java.lang.classloader.findclass (unknown source)
at java.lang.classloader.loadclass (unknown source)
at java.lang.classloader.loadclass (unknown source)
at org.rsbot.util.uncachedClassLoader.loadclass(uncac hedClassLoader.java:41)
...41 more

i tried to run rsbot on my moms laptop (copied all files to momory stick and put on my moms laptop) AND IT WORKS JUST FINE . i srsly need help with this one since im not coder and i cant understand this error .