Hi you all.
I've got a problem validating an XML file using the following Schema (I'll
post only the beginning of this):

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<?xml version="1.0" encoding="utf-8"?>
<xs:schema xmlns="http://tempuri.org/ae" elementFormDefault="qualified"
targetNamespace="http://tempuri.org/ae"
xmlns:xs="http://www.w3.org/2001/XMLSchema">
 <xs:element name="FileContratti">
   <xs:complexType>
  .... (to be continue)...
----------------------------------------------------------------------------

The header of the XML file to validate is the following:
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<?xml version="1.0" encoding="UTF-8"?>
<FileContratti CodiceFiscaleFornitore=""
CodiceFiscaleConto="a1" CodiceUfficio="" ValutaPrelievo="1">
  ...(omitted)... ...
</FileContratti>
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The XML parser arises an error:

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System.Exception ---> System.Xml.Schema.XmlSchemaException:
The attribute targetNamespace does not match the designated namespace URI.
An error occurred at file:///C:/tmp/schema.xsd, (2, 2).
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Does anything miss in the declaration/header of the XML file?
What's the problem?
Can anybody help me?

Thx!