java.io.IOException

why I get this error:
Test:
import com.meterware.httpunit.*;

import junit.framework.*;


/**
 * An example of testing servlets using httpunit and JUnit.
 **/
public class ExampleTest extends TestCase {


	public static void main(String args[]) {
        junit.textui.TestRunner.run( suite() );
	}
	
	
	public static Test suite() {
		
		return new TestSuite( ExampleTest.class );
	}


	public ExampleTest( String name ) {
	    super( name );
	}


    /**
     * Verifies that the welcome page has exactly one form, with the single parameter, "name"
     **/
    public void testWelcomePage() throws Exception {
    	HttpUnitOptions.setExceptionsThrownOnErrorStatus(false);
    	HttpUnitOptions.setExceptionsThrownOnScriptError(false);
    	HttpUnitOptions.setScriptingEnabled(false);
    	HttpUnitOptions.setLoggingHttpHeaders(true);
    	HttpUnitOptions.setCheckContentLength(false);
    	
        WebConversation     conversation = new WebConversation();
        WebRequest request = new GetMethodWebRequest( "http://www.is24.de" );
        WebResponse response=null;
        response = conversation.getResponse( request );
        WebForm forms[] = response.getForms();
        System.out.println(forms.length);
    }
}
Error:
........
Connecting to imps.immobilienscout24.de
Sending:: GET http://imps.immobilienscout24.de/?adiframe|2.0|247|65095|1|12|;KEY=home;target=_blank;
Sending:: User-Agent: httpunit/1.5
Sending:: Accept-Encoding: gzip

Received from http://imps.immobilienscout24.de/?adiframe|2.0|247|65095|1|12|;KEY=home;target=_blank;
Header:: null
E
Time: 4,195
There was 1 error:
1) testWelcomePage(ExampleTest)java.io.IOException
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:602)
	at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:272)
	at com.meterware.httpunit.HttpWebResponse.readResponseHeader(HttpWebResponse.java:162)
	at com.meterware.httpunit.HttpWebResponse.readHeaders(HttpWebResponse.java:200)
	at com.meterware.httpunit.HttpWebResponse.<init>(HttpWebResponse.java:56)
	at com.meterware.httpunit.HttpWebResponse.<init>(HttpWebResponse.java:67)
	at com.meterware.httpunit.WebConversation.newResponse(WebConversation.java:76)
	at com.meterware.httpunit.WebWindow.getResource(WebWindow.java:164)
	at com.meterware.httpunit.WebWindow.getSubframeResponse(WebWindow.java:128)
	at com.meterware.httpunit.FrameHolder.updateFrames(FrameHolder.java:184)
	at com.meterware.httpunit.WebWindow.updateFrameContents(WebWindow.java:252)
	at com.meterware.httpunit.WebClient.updateFrameContents(WebClient.java:485)
	at com.meterware.httpunit.WebWindow.updateWindow(WebWindow.java:146)
	at com.meterware.httpunit.WebWindow.getSubframeResponse(WebWindow.java:130)
	at com.meterware.httpunit.WebWindow.getResponse(WebWindow.java:121)
	at com.meterware.httpunit.WebWindow.updateWindow(WebWindow.java:144)
	at com.meterware.httpunit.WebWindow.getSubframeResponse(WebWindow.java:130)
	at com.meterware.httpunit.WebWindow.getResponse(WebWindow.java:121)
	at com.meterware.httpunit.WebClient.getResponse(WebClient.java:113)
	at ExampleTest.testWelcomePage(ExampleTest.java:42)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at ExampleTest.main(ExampleTest.java:14)
Caused by: java.net.SocketException: Unexpected end of file from server
	at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:822)
	at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:711)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:635)
	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:1530)
	at com.meterware.httpunit.HttpWebResponse.loadHeaders(HttpWebResponse.java:213)
	at com.meterware.httpunit.HttpWebResponse.readHeaders(HttpWebResponse.java:198)
	... 32 more

FAILURES!!!
Tests run: 1,  Failures: 0,  Errors: 1





Cheers 
H.Braun

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