[scala-tools] NoClassDefFoundError with Eclipse Plugin

This kind of bug seems to be recurrent.

I wrote the simple HelloWorld application, I use "Run as - Scala
application", I get the above exception.
I see that the .class file are not created in the bin directory.

Eclipse 3.4.1
Plugin 2.7.4
JDK 1.6.0_13

Any hints?

Thanks

Bye

Franco

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
http://www.francolombardo.net
Scala, Java, As400.....
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~