Some problems to import Gmail contactList

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.NET

Google

Gmail

google-api

I try to import Gmail Contacts. I have this block code:

public void GetGmailContacts(string p_name, string login, string password)
{
    RequestSettings rs = new RequestSettings(p_name, login, password);
    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);
        }
    }
}

But in this row:

foreach (Contact t in f.Entries)

I get this exception:

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

Any idea why do I get this exception and how to solve it?
Thank you for advance.