undefined element in wsdl

hi, i am getting undefined element for "Trantruct" in the following part of my wsdl. what could be here the issue:

<types>
             <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
             xmlns:tns="http://localhost/wsdl/Mplex.wsdl"
        targetNamespace="http://localhost/wsdl/Mplex.wsdl">
       <ComplexType name="Tran" maxOccurs="999">
    <sequence>
    <element name="Conate" type="xsd:string"/>
    <element name="Conount" type="xsd:string"/>
    <element name="Conency" type="xsd:string"/>
    <element name="Conype" type="xsd:string"/>
    <element name="Contion" type="xsd:string"/>
    <element name="Condit" type="xsd:string"/>
    <element name="Conence" type="xsd:string"/>
    </sequence>
    </ComplexType>
        <element name="Trantruct" type="tns:Tran"/>
 <xsd:/schema>
 </types>

<message name="ponse">
                     <part name="Isl" type="xsd:string"/>
                     <part name="Use" type="xsd:string"/>
                      <part name="Ori" type="xsd:string"/>
                     <part name="Accype" type="xsd:string"/>
                     <part name="Accer" type="xsd:string"/>
                     <part name="Tranrence" type="xsd:string"/>
                     <part name="Timp" type="xsd:DateTime"/>
                      <part name="Resde" type="xsd:string"/>
                      <part element="tns:Trantruct" name="Transaction"/>
                     </message>