Inheriting an XSD element with inheritance does not work

I try to inherit and restrict an element, but I get the following error (in eclipse check):

A type particle is not an acceptable limitation of a base particle.

The Description element must not be part of the TypeDevice element. I just can't understand why. This should be possible (according to this tutorial ):

Can anybody help me?

hello

Bill

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.example.com" xmlns="http://www.example.com" elementFormDefault="qualified" attributeFormDefault="unqualified">
  <!--  Abstract Base Class  -->
  <xs:complexType name="AbstractDevice" abstract="true">
    <xs:sequence>
      <xs:element name="Name" type="xs:string" />
      <xs:element name="Description" type="xs:string" />
    </xs:sequence>
    <xs:attribute name="id" type="xs:string" />
  </xs:complexType>

  <!--  Inheritance with restriction  -->
  <xs:complexType name="TypeDevice">
    <xs:complexContent>
      <xs:restriction base="AbstractDevice">                                
        <xs:sequence>
          <xs:element name="Name" type="xs:string" />
        </xs:sequence>
        <xs:attribute name="id" type="xs:string" use="required" />
      </xs:restriction>                        
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="TypeRoot">
    <xs:sequence>
      <xs:element name="Device" type="TypeDevice" />
    </xs:sequence>                
  </xs:complexType>
  <xs:element name="Configuration" type="TypeRoot" />
</xs:schema>