XSD class generation nested tables problem

<?xml version="1.0" encoding="utf-8"?>
<xs:schema id="XSDobject" targetNamespace="http://tempuri.org/XSDobject.xsd" elementFormDefault="qualified" xmlns="http://tempuri.org/XSDobject.xsd" xmlns:mstns="http://tempuri.org/XSDobject.xsd" xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:element name="order">
    	<xs:complexType>
    		<xs:sequence>
    			<xs:element name="contact">
    				<xs:complexType>
    					<xs:sequence>
    						<xs:element name="name" type="xs:string" />
    						<xs:element name="phone" type="xs:string" />
    					</xs:sequence>
    				</xs:complexType>
    			</xs:element>
    			<xs:element name="buyer">
    				<xs:complexType>
    					<xs:sequence>
    						<xs:element name="contact">
    							<xs:complexType>
    								<xs:sequence>
    									<xs:element name="name" type="xs:string" />
    									<xs:element name="phone" type="xs:string" />
    								</xs:sequence>
    							</xs:complexType>
    						</xs:element>
    					</xs:sequence>
    				</xs:complexType>
    			</xs:element>
    		</xs:sequence>
    	</xs:complexType>
    </xs:element>
</xs:schema>

<?xml version="1.0" encoding="utf-8"?>
<xs:schema id="XSDobject" targetNamespace="http://tempuri.org/XSDobject.xsd" elementFormDefault="qualified" xmlns="http://tempuri.org/XSDobject.xsd" xmlns:mstns="http://tempuri.org/XSDobject.xsd" xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:group name="Contact">
    <xs:sequence>
      <xs:element name="name" type="xs:string" />
      <xs:element name="phone" type="xs:string" />
    </xs:sequence>
  </xs:group>
  <xs:element name="order">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="OrderContact">
          <xs:complexType>
            <xs:sequence>
              <xs:group ref="Contact"/>
            </xs:sequence>
          </xs:complexType>
        </xs:element>
        <xs:element name="buyer">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="BuyerContact">
                <xs:complexType>
                  <xs:sequence>
                    <xs:group ref="Contact"/>
                  </xs:sequence>
                </xs:complexType>
              </xs:element>
            </xs:sequence>
          </xs:complexType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>

...
  <xsl:template match="*">
     <xsl:param name="parentElm">
       <xsl:value-of select="name(..)" />
     </xsl:param>
     <xsl:choose>
       <xsl:when test="local-name() = 'Contact'">
         <xsl:element name="{concat('Contact',$parentElm)}">
           <xsl:apply-templates select="@* | node()" />
         </xsl:element>
       </xsl:when> <xsl:otherwise>
         <xsl:element name="{local-name()}">
           <xsl:copy-of select="@*" />
           <xsl:apply-templates select="@* | node()" />
         </xsl:element>
       </xsl:otherwise>
     </xsl:choose>   </xsl:template> ...