Import contact from gmail

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C#

Gmail

hi experts,
i want to import contact in gmail i am using

using Google.GData.Contacts;
using Google.GData.Client;
using Google.GData.Extensions;
using Google.Contacts;

API. but it give exception

my code is

public static DataSet GetGmailContacts(string App_Name, string Uname, string UPassword)
    {

        DataSet ds = new DataSet();

        DataTable dt = new DataTable();

        DataColumn C2 = new DataColumn();

        C2.DataType = Type.GetType("System.String");

        C2.ColumnName = "EmailID";

        dt.Columns.Add(C2);



        RequestSettings rs = new RequestSettings(App_Name, Uname, UPassword);

        rs.AutoPaging = true;

        ContactsRequest cr = new ContactsRequest(rs);

        Feed<contact> f = cr.GetContacts();

        foreach (Contact t in f.Entries)
        {

            foreach (EMail email in t.Emails)
            {

                DataRow dr1 = dt.NewRow();

                dr1["EmailID"] = email.Address.ToString();

                dt.Rows.Add(dr1);

            }

        }

        ds.Tables.Add(dt);

        return ds;

    } 

And exception is:

<br />
Execution of request returned unexpected result: http://www.google.com/m8/feeds/contacts/default/fullMovedPermanently</contact>