开发了一个学校教务网的客户端来获取成绩、课表等，出现错误，希望大家可以帮帮忙

在安卓虚拟机上运行出现  unfortunately，xxx has been stopped, Logcat中提提示的错误与HttpClient有关，有人称之为http下载数据失败。求助大家。源码：
com.example.scoreclient.loginActivitypublic class LoginActivity extends Activity {
Button login;
EditText nameView;
EditText passView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login);

login=(Button)findViewById(R.id.login);
nameView=(EditText)findViewById(R.id.name);
passView=(EditText)findViewById(R.id.pass);
String name=new String();
String pass=new String();
name=nameView.getText().toString();
pass=passView.getText().toString();
//检测是否登录成功，并获取登录后的Cookie
String url="http://202.115.47.141/loginAction.do";
List<Cookie> cookies = new ArrayList<Cookie>();
String resultHtml=new String();
DefaultHttpClient httpclient=new DefaultHttpClient();
HttpPost httppost=new HttpPost(url);
//建立HttpPost对象
 List<NameValuePair> params=new ArrayList<NameValuePair>();
//建立一个NameValuePair数组，用于存储欲传送的参数
params.add(new BasicNameValuePair("zjh",name));
params.add(new BasicNameValuePair("mm",pass));
//添加参数
try {
httppost.setEntity(new UrlEncodedFormEntity(params,HTTP.UTF_8));
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//设置编码
HttpResponse response2=null;
try {
 response2 = httpclient.execute(httppost);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

if(response2.getStatusLine().getStatusCode()==200){//如果状态码为200,就是正常返回
//String result=EntityUtils.toString(response2.getEntity());
cookies=((AbstractHttpClient)httpclient).getCookieStore().getCookies();
//Toast.makeText(this, "登录成功", 3000).show();
//保存cookie
CookieMng cookManager=(CookieMng)getApplication();
cookManager.setCookie(cookies);
//跳转界面

Intent intent=new Intent(LoginActivity.this,ScoreActivity.class);
finish();//结束本activity
startActivity(intent);

}
else{

}
//Toast.makeText(this, "登录失败", 3000).show();


}还有CookieMng.java 和 ScoreActivity.java在此省略我的配置文件如下：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.scoreclient"
    android:versionCode="1"
    android:versionName="1.0" >    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />
<uses-permission 
    android:name="android.permission.INTERNET"/>
    <application 
        android:name=".CookMng"
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.scoreclient.LoginActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.scoreclient.ScoreActivity">
            <intent-filter>
                <action android:name="androdi.intent.action.View"/>
                <category android:name="android.intent.category.DEFAULT"/>
            </intent-filter>
        </activity>
    </application>
</manifest>