Running a compiled class

Either something drastic has changed since I last tried this - or I'm
suffering from even more extreme brain fade than normal ....

I have a small scala prog which I put together to play with the
httpclient libraries. It works (runs) in eclipse just fine. scalac
compiles it to a class without errors - but when I try and run
the .class file it fails with a java.lang.ClassNotFoundException. The
exception is pointing to the class that was just compiled and is in
the current directory. So I added that directory by name to the
classpath - same result. So I tried adding a java class to call it in
eclipse - and that fails to compile/run for what appears to be an
associated reason - 'Cannot figure out how to run target'

Code snippets are below, help and suggestions using short words please
- clearly I am currently incapable of advanced understanding today.

/************************
Scala object with main
*************************/
package sp1

object ReadNet {

def main(args: Array[String]) {

val s1 = "http"
val i1 = -1
var site = "graphical.weather.gov"
var s3 = "/xml/sample_products/browser_interface/
ndfdXMLclient.php"
var s4 = "lat=38.799697&lon=-121.271962&product=time-
series&startTime=2004-01-01T00:00:00&endTime=2013-04-20T00:00:00&maxt=maxt&mint=mint"

var uri: URI = URIUtils.createURI(s1, site, i1, s3,s4, null);

try {
var stuff = new GetStuff(uri)
val newForecast = new(CreateForecastObject)(stuff.xml)
} catch {
case ex : RuntimeException => println ("connect failed with " +
ex)
}

}

}
/********************
Java calling prog
********************/
package scala.loader;

import java.util.*;

public class ScalaEntryPoint {

public static void main(String[] args) {
List argList = new ArrayList();
argList.add("ReadNet");
for (String s : args) argList.add(s);
scala.tools.nsc.MainGenericRunner.main(argList.toArray(new
String[0]));

}

}

/*********************
class invocation error
********************/
PS C:\dev\workspace\sc1\src\sp1> scala -howtorun:object ReadNet.class
java.lang.ClassNotFoundException: ReadNet.class (args = , classpath =
C:\glassfish3\jdk\jre\lib\resources.jar;C:\glassfish3\jdk\jre\lib
\rt.jar;C:\glassfish3\jdk\jre\lib\jsse.jar;C:\glassfish3\jdk\jre\lib
\jce.jar;C:\glassfish3\jdk\jre\lib\ch arsets.jar;C:\glassfish3\jdk\jre
\lib\ext\dnsns.jar;C:\glassfish3\jdk\jre\lib\ext\localedata.jar;C:
\glassfish3\jdk\jre\li b\ext\sunjce_provider.jar;C:\dev\SCALA-~1.FIN
\bin\..\lib\jline.jar;C:\dev\SCALA-~1.FIN\bin\..\lib\scala-
compiler.jar;C:\ dev\SCALA-~1.FIN\bin\..\lib\scala-dbc.jar;C:\dev
\SCALA-~1.FIN\bin\..\lib\scala-library.jar;C:\dev\SCALA-~1.FIN\bin\..
\li b\scala-swing.jar;C:\dev\SCALA-~1.FIN\bin\..\lib\scalap.jar;C:
\glassfish3\jdk\lib;C:\dev\workspace\sc1\src\sp1)