java compile error Set/HtmlUnit question

i've got a test app that i'm trying to get to compile. it deals with
the htmlunit lib. new to java, and as far as i can tell, the issue
seems to be some kind of conflict between the httpunit, and htmlunit
Cookie defs...

any help/pointerst regarding the cookie/list issue would be helpful...

thanks

here's the compile cmd/return errs....
============================================
javac -classpath '/opt/htmlunit/lib/*:/parseapp2/' sj_registrar.java

sj_registrar.java:57: incompatible types
found : java.util.Set<com.gargoylesoftware.htmlunit.util.Cookie>
required: java.util.Set<org.apache.commons.httpclient.Cookie>
           Set<org.apache.commons.httpclient.Cookie> cookies =
webClient.getCookieManager().getCookies();

                        ^
1 error

here's the test code:
==================
/*
// chunk to test the htmlunit process for extracting data from
// dynamic/javascript sites...
//
//
//877-633-8870
*/

//package com.examples.htmlunit;
//package parseapp2;

import java.io.IOException;
import java.net.URL;
import java.util.List;
import java.util.Set;

import org.apache.commons.httpclient.Cookie;

import com.gargoylesoftware.htmlunit.CookieManager;
import com.gargoylesoftware.htmlunit.BrowserVersion;
import com.gargoylesoftware.htmlunit.Page;
import com.gargoylesoftware.htmlunit.RefreshHandler;
import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.html.HtmlAnchor;
import com.gargoylesoftware.htmlunit.html.HtmlForm;
import com.gargoylesoftware.htmlunit.html.HtmlPage;
import com.gargoylesoftware.htmlunit.html.HtmlTable;
import com.gargoylesoftware.htmlunit.html.HtmlTableRow;

public class sj_registrar {

       public static void main(String[] args) throws Exception {

               // Create and initialize WebClient object
// WebClient webClient = new WebClient
(BrowserVersion.EXPLORER_7);
           WebClient webClient = new WebClient
(BrowserVersion.FIREFOX_3);
           //WebClient webClient = new WebClient();
           webClient.setThrowExceptionOnScriptError(false);
           webClient.setRefreshHandler(new RefreshHandler() {
                       public void handleRefresh(Page page, URL url,
int arg) throws IOException {
                               //System.out.println("handleRefresh");
                       }

           });

           // visit Yahoo Mail login page and get the Form object
                String url;
                //url="http://apps.oti.fsu.edu/RegistrarCourseLookup/
SearchForm";
                url="https://cmshr.sjsu.edu/psc/HSJPRDF/EMPLOYEE/
HSJPRD/c/COMMUNITY_ACCESS.CLASS_SEARCH.GBL?
FolderPath=PORTAL_ROOT_OBJECT.PA_HC_CLASS_SEARCH&amp;PortalActualURL=https
%3a%2f%2fcmshr.sjsu.edu%2fpsc%2fHSJPRDF%2fEMPLOYEE%2fHSJPRD%2fc
%2fCOMMUNITY_ACCESS.CLASS_SEARCH.GBL&amp;PortalRegistryName=EMPLOYEE&amp;PortalServletURI=https
%3a%2f%2fcmshr.sjsu.edu%2fpsp%2fHSJPRDF%2f&amp;PortalURI=https%3a%2f
%2fcmshr.sjsu.edu%2fpsc%2fHSJPRDF
%2f&amp;PortalHostNode=HRMS&amp;NoCrumbs=yes";
           //HtmlPage page = (HtmlPage)
webClient.getPage("https://login.yahoo.com/config/
login_verify2?.intl=us&.src=ym");
           HtmlPage page = (HtmlPage) webClient.getPage(url);

                //HtmlPage foo = page.getContentAsString();


           //Set<Cookie> cookies = webClient.getCookieManager
().getCookies();
           Set<org.apache.commons.httpclient.Cookie> cookies =
webClient.getCookieManager().getCookies();

BLOWING UP HERE!!!!


           //cookies = webclient.getCookieManager().getCookies;
// try{
// }
// catch(ScriptException e){}

      System.out.println("here \n"); //disply the text/content of
the page
           //Set<Cookie> cookies = wb.getCookieManager().getCookies();
           String strCookie = "";

                for(Cookie c : cookies){
         strCookie +=c.getName()+"="+c.getValue()+";";
        }
      System.out.println(strCookie); //disply the text/content of
the page

                String foo1 = page.getWebResponse().getContentAsString
();
      System.out.println(foo1); //disply the text/content of the
page
                System.exit(0);

// System.out.println("\n\n\n"); //disply the text/content of
the page
           HtmlForm form = page.getFormByName("searchForm");
                //String foo2 = form.getContentAsString();
                String foo2 = form.asText();
// System.out.println(foo2); //disply the text/content of the
page
// System.out.println("qqqqqqqqq \n\n"); //disply the
text/content of the page

                //set the term
                String termval="20101";
                form.getSelectByName("term").setSelectedAttribute
(termval,true);
                foo2=form.getSelectByName("term").asXml();
// System.out.println(foo2); //disply the text/content of the
page
                webClient.waitForBackgroundJavaScript(25);
// page.wait(1000);
                foo2=form.getSelectByName("department").asXml();
// System.out.println(foo2); //disply the text/content of the
page
// System.out.println("\n\n\n\n\n\n"); //disply the
text/content of the page
// foo1 = page.getWebResponse().getContentAsString();
                foo1 = page.asXml();
      System.out.println(foo1); //disply the text/content of the
page
       }
}