Junit3 error: Implicit super constructor TestCase() is not visible

The following code has this error compiled in Eclipse:
Implicit super constructor TestCase() is not visible. Must explicitly
invoke another constructor

package com.my.prog;

import junit.framework.*;
import javax.naming.*;
import javax.rmi.PortableRemoteObject;

public abstract class TestProIndexBean extends TestCase {

    static {
       System.setProperty(Context.INITIAL_CONTEXT_FACTORY,
"weblogic.jndi.WLInitialContextFactory");
       System.setProperty(Context.PROVIDER_URL, "iiop://localhost:
7001" );
    }

    private ProIndex proIndex = null;
    private ProIndexHome home = null;

    protected void setUp() throws Exception {

        super.setUp();
        if( home == null ) {
            Context context = new InitialContext();
            home = (ProIndexHome)PortableRemoteObject.narrow(
                context.lookup("com.my.prog.business.ProIndexHome"),
                ProIndexHome.class);
        }
        proIndex = home.create();
    }

    protected void tearDown() throws Exception {
        proIndex.remove();
        super.tearDown();
    }

    public void testProIndexRequest1() throws Exception {

        System.out.println("testProIndexRequest1()");
        ProIndexRequest request = new ProIndexRequest();
        ProIndexResponse actualReturn =
proIndex.getProIndexInfo(request);
        this.assertEquals("0000", actualReturn.getCd());

    }
}