validate xml document against schema that use constraints

I am having a problem and i am unable to validate an XML document because of constraints. I have an XML Document that is like this:

<?xml version="1.0" encoding="UTF-8"?>
<organisation xmlns:xsi="http://ift.tt/ra1lAU" xsi:noNamespaceSchemaLocation="organisation.xsd">
<services>
    <service num="direct">
        <nom>Direction</nom>
        <responsable num="100"/>
    </service>
    <service num="compta">
        <nom>Comptabilite</nom>
        <responsable num="101"/>
    </service>
    <service num="com">
        <nom>Communication</nom>
    </service>
</services>
<employes xmlns="http://www.employe.dz">
    <employe id="101">
        <nom>Krecker</nom>
        <prenom>Ralf</prenom>
        <activites>
            <activite ref="compta"/>
        </activites>
        <details>
            <age>29</age>
            <sexe>Homme</sexe>
        </details>
    </employe>
    <employe id="100">
        <nom>Willey</nom>
        <prenom>Joey</prenom>
        <activites>
            <activite ref="compta"/>
            <activite ref="direct"/>
        </activites>
    </employe>
</employes>
</organisation>

This is my XML Schema Code: employes.xsd:

 <?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://ift.tt/tphNwY" elementFormDefault="qualified"
    targetNamespace="http://www.employe.dz" xmlns = "http://www.employe.dz"> 
<xs:element name="employes">
    <xs:complexType>
        <xs:sequence>
          <xs:element name="employe" maxOccurs="unbounded">
              <xs:complexType>
                  <xs:sequence>
                      <xs:element name="nom" type="xs:string"/>
                      <xs:element name="prenom" type="xs:string"/>    
                      <xs:element name="activites">
                          <xs:complexType>
                              <xs:sequence>
                                  <xs:element name="activite" maxOccurs="unbounded">
                                      <xs:complexType>
                                          <xs:attribute name="ref" type="xs:string"/>
                                      </xs:complexType>
                                  </xs:element>
                              </xs:sequence>
                          </xs:complexType>
                      </xs:element>
                      <xs:element name="details" minOccurs="0">
                          <xs:complexType>
                              <xs:sequence>
                                  <xs:element name="age" type="xs:nonNegativeInteger"/>
                                  <xs:element name="sexe" type="xs:string"/>
                              </xs:sequence>
                          </xs:complexType>
                      </xs:element>

                  </xs:sequence>
                  <xs:attribute name="id" type="xs:string" use="required"/>
              </xs:complexType>
          </xs:element>  
        </xs:sequence>
    </xs:complexType>
    <xs:key name="cleEmploye">
        <xs:selector xpath="employe"/>
        <xs:field xpath="@id"/>
    </xs:key>
</xs:element>
</xs:schema>

organisation.xsd:

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://ift.tt/tphNwY" xmlns:p = "http://www.employe.dz">
    <xs:import namespace="http://www.employe.dz" schemaLocation="employes.xsd"/>
    <xs:element name="services">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="service" maxOccurs="unbounded">
                    <xs:complexType>
                        <xs:sequence>
                            <xs:element name="nom" type="xs:string"/>
                            <xs:element name="responsable" minOccurs="0">
                                <xs:complexType>
                                    <xs:attribute name="num" type="xs:string"/>
                                </xs:complexType>
                            </xs:element>
                        </xs:sequence>
                        <xs:attribute name="num" type="xs:string"/>
                    </xs:complexType>
                </xs:element>
            </xs:sequence>
        </xs:complexType>
        <xs:key name="cleService">
            <xs:selector xpath="service"/>
            <xs:field xpath="@num"/>
        </xs:key>
    </xs:element>
    <xs:element name="organisation">
        <xs:complexType>
            <xs:sequence>
                <xs:element ref="services"/>
                <xs:element ref="p:employes"/>
            </xs:sequence>
        </xs:complexType>
        <xs:keyref refer="p:cleEmploye" name="foreignKey1">
            <xs:selector xpath="services/service/responsable"/>
            <xs:field xpath="@num"/>
        </xs:keyref>
        <xs:keyref refer="cleService" name="foreignKey2">
            <xs:selector xpath="p:employes/p:employe/p:activites/p:activite"/>
            <xs:field xpath="@ref"/>
        </xs:keyref>
    </xs:element>
</xs:schema>

i use oXygen version 16.1. when i validate the document, i have the error below:

Gravité: error Description: cvc-identity-constraint.4.3: Key 'foreignKey1' with value '100' not found for identity constraint of element 'organisation'. Emplacement de début: 37:16 URL: http://ift.tt/1CQwu1v