i need a little bit of help , also im new

im new to forums , just started today infact and i was about to play , clicking the 'powerscape.bat' button and it loads and everything , but before i get ot the login screen this accures;

Exception in thread "main" java.lang.NoClassDefFoundError: EGUI
Caused by: java.lang.ClassNotFoundException: EGUI
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: EGUI. Program will exit.
Press any key to continue . . .

i know right. any help? just wondered if i did anything wrong

also it says in chat box 'you are dissconnected' just wondering if thats normal :\

sorry for double posting