XSD XML Validation C#

I'm working on some project and get some problem with validation XML via XSD i have that sheme schema:

<?xml version="1.0" encoding="utf-8"?>
<xs:schema xmlns:xs="http://ift.tt/tphNwY"
    targetNamespace="http://ift.tt/1rLzZki"
    xmlns="http://ift.tt/1rLzZki"
    elementFormDefault="qualified"
    attributeFormDefault="unqualified">

  <xs:complexType name="ct_errors">
    <xs:sequence>
      <xs:element name="error" maxOccurs="unbounded">
        <xs:complexType>
          <xs:simpleContent>
            <xs:extension base="xs:string">
              <xs:attribute name="code" type="xs:int"/>
            </xs:extension>
          </xs:simpleContent>
        </xs:complexType>
      </xs:element>
    </xs:sequence>
  </xs:complexType>

  <xs:element name="createShepherdRequest">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="shepherd" minOccurs="1" maxOccurs="1">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="name" type="xs:string" minOccurs="1"/>
              <xs:element name="sheeps">
                <xs:complexType>
                  <xs:sequence>
                    <xs:element name="sheep" minOccurs="1" maxOccurs="unbounded">
                      <xs:complexType>
                        <xs:sequence>
                          <xs:element name="colour" type="xs:string" minOccurs="1"/>
                        </xs:sequence>
                      </xs:complexType>
                    </xs:element>
                  </xs:sequence>
                </xs:complexType>
              </xs:element>
            </xs:sequence>
          </xs:complexType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>

  <xs:element name="createShepherdResponse">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="shepherd" maxOccurs="1">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="errors" type="ct_errors" minOccurs="0"/>
              <xs:element name="shepherdId" type="xs:int" minOccurs="0"/>
            </xs:sequence>
          </xs:complexType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>

  <xs:element name="getAllShepherdsRequest">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="listSheeps" type="xs:boolean" minOccurs="1"/>
      </xs:sequence>
    </xs:complexType>
  </xs:element>

  <xs:element name="getAllShepherdsResponse">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="shepherds">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="shepherd" maxOccurs="unbounded">
                <xs:complexType>
                  <xs:sequence>
                    <xs:element name="errors" type="ct_errors" minOccurs="0"/>
                    <xs:element name="shepherdId" type="xs:int" minOccurs="0"/>
                    <xs:element name="name" type="xs:string" minOccurs="0"/>
                    <xs:element name="sheeps">
                      <xs:complexType>
                        <xs:sequence>
                          <xs:element name="sheep" minOccurs="0" maxOccurs="unbounded">
                            <xs:complexType>
                              <xs:sequence>
                                <xs:element name="id" type="xs:int" minOccurs="1"/>
                                <xs:element name="colour" type="xs:string" minOccurs="1"/>
                                <xs:element name="createdOn" type="xs:dateTime" minOccurs="1"/>
                              </xs:sequence>
                            </xs:complexType>
                          </xs:element>
                        </xs:sequence>
                      </xs:complexType>
                    </xs:element>
                  </xs:sequence>
                </xs:complexType>
              </xs:element>
            </xs:sequence>
          </xs:complexType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>

  <xs:element name="deleteShepherdRequest">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="shepherd" minOccurs="1" maxOccurs="1">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="shepherdId" type="xs:int" minOccurs="1"/>
            </xs:sequence>
          </xs:complexType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>

  <xs:element name="deleteShepherdResponse">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="shepherd" maxOccurs="1">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="errors" type="ct_errors" minOccurs="0"/>
              <xs:element name="deletedShepherdId" type="xs:int" minOccurs="0"/>
            </xs:sequence>
          </xs:complexType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>

and i create xml request using XDocument:

XNamespace xn = "http://ift.tt/1rLzZki";
        var xd = new XDocument(new XDeclaration("1.0", "utf-8", null),
            new XElement(xn + "getAllShepherdsResponse",
                                    from emp in db.Shepherds.ToList()
                                    select new XElement(xn+"shepherd",
                                                 new XElement(xn + "shepherdId", emp.Id),
                                                 new XElement(xn + "name", emp.Name),
                                                 new XElement(xn + "sheeps", from sp in emp.Sheep
                                                                             select new XElement(xn + "sheep",
                                                                            new XElement(xn + "id", sp.Id),
                                                                            new XElement(xn + "colour", sp.Colour),
                                                                            new XElement(xn + "createdOn", sp.CreatedOn)))
                                  )));

i create class to validate my XML:

public XDocument ValidateDocument(XDocument xd)
        {
            int error = 0;
            string error_m = string.Empty;
            XNamespace xn = "http://ift.tt/1rLzZki";
            XmlSchemaSet schemaSet = new XmlSchemaSet();
            schemaSet.Add(xn.ToString(), AppDomain.CurrentDomain.BaseDirectory + "Sheep.xsd");
            xd.Validate(schemaSet, (o, e) =>
            {
                error = e.Exception.HResult;
                error_m = e.Message.ToString();
            }, true);
            return xd;
        }

And i always get this error_m ="The element 'getAllShepherdsResponse' in namespace 'http://ift.tt/1rLzZki' has invalid child element 'shepherd' in namespace 'http://ift.tt/1rLzZki'. List of possible elements expected: 'shepherds' in namespace 'http://ift.tt/1rLzZki'." What is my problem guys?