Finally started, but:

#Session:-207343824;Wed Dec 06 15:02:28 CET 2006
-207343824#[main] DEBUG - MP v0.92 beta, jre:1.5.0_07-b03, jvm:1.5.0_07-b03,os:Linux, res:1280x1024
-207343824#[main] DEBUG - MP Language : Default
-207343824#[main] ERROR - ERROR : could not load mana picture 5
-207343824#[main] ERROR -       java.lang.StringIndexOutOfBoundsException: String index out of range: 8
-207343824#[main] ERROR -               at java.lang.String.substring(String.java:1765)
-207343824#[main] ERROR -               at org.mortbay.util.Password.deobfuscate(Password.java:120)
-207343824#[main] ERROR -               at net.sf.magicproject.tools.MToolKit.getHttpConnection(MToolKit.java:603)
-207343824#[main] ERROR -               at net.sf.magicproject.tools.Picture.download(Picture.java:167)
-207343824#[main] ERROR -               at net.sf.magicproject.tools.Picture.loadImage(Picture.java:322)
-207343824#[main] ERROR -               at net.sf.magicproject.tools.Picture.loadImage(Picture.java:256)
-207343824#[main] ERROR -               at net.sf.magicproject.clickable.mana.Mana.init(Mana.java:113)
-207343824#[main] ERROR -               at net.sf.magicproject.ui.MagicUIComponents.setToolKitMdb(MagicUIComponents.java:755)
-207343824#[main] ERROR -               at net.sf.magicproject.AbstractMainForm.setMdb(AbstractMainForm.java:183)
-207343824#[main] ERROR -               at net.sf.magicproject.Magic.<init>(Magic.java:210)
-207343824#[main] ERROR -               at net.sf.magicproject.Magic.main(Magic.java:585)
-207343824#[main] ERROR -               at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
-207343824#[main] ERROR -               at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
-207343824#[main] ERROR -               at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
-207343824#[main] ERROR -               at java.lang.reflect.Method.invoke(Method.java:585)
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string used to let it start:

java -Dhttp.proxyHost=MYPROXY -Dhttp.proxyPort=PROXYPORT -cp . -jar starter.jar

linux guys, remember to add -cp . to let it start !!!!
Bye,
  Sventrax