Linux Newbie needs Help

Hello

Well, i got sick of trying to figure out how to install LimeWire so i thought id give Phex a try....
heh heh
I downloaded 0.5.2 & unzipped it.

Changed my directory to where i unzipped the files & typed
java -jar phex.jar in a terminal window

I was told by my terminal :

java.lang.NoClassDefFoundError: phex/splashWindow
at java.lang.reflect.method.invoke(Method.java:native )
at kaffe.jar.ExecJarName.main(ExecJarName.java:70)
at
kaffe.jar.ExecJar.main(ExecJar.java:59)

Since i do not speak Linux yet, i need a translator

! help.... : )