Hey all,

i downloaded Minecraft Beta for Linux and started it as root  with java -jar minecraft.jar . Everything seems to work until i tried to log in it just tells me User not Premium you have to play online once to enable offline.
I just want to play the Beta offline...

Heres the what the console told:

java.io.FileNotFoundException: /root/.minecraft/lastlogin (No such file or directory)
    at java.io.FileInputStream.open(Native Method)
    at java.io.FileInputStream.<init>(FileInputStream.java:106)
    at net.minecraft.LoginForm.readUsername(LoginForm.java:72)
    at net.minecraft.LoginForm.<init>(LoginForm.java:42)
    at net.minecraft.LauncherFrame.<init>(LauncherFrame.java:20)
    at net.minecraft.LauncherFrame.main(LauncherFrame.java:137)
    at net.minecraft.MinecraftLauncher.main(MinecraftLauncher.java:13)

I tried to run Minecraft with  java -Xmx1024M -Xms512M -cp Minecraft.jar net.minecraft.LauncherFrame  then, but the program didnt even start...

The console:

Exception in thread "main" java.lang.NoClassDefFoundError: net/minecraft/LauncherFrame
Caused by: java.lang.ClassNotFoundException: net.minecraft.LauncherFrame
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
Could not find the main class: net.minecraft.LauncherFrame.  Program will exit.

i am using linux sabayon

Can you help me?