Hi everyone,

i have a simple xml document and its xsd as attached below. When i try to 
validate the xml in VS.net 2003 by clicking [XML->Validate XML Data] menu, I 
got the error: 
C:\PlantStructure.xml(1): The 'urn:myschema-aprs:PlantStructure' element is 
not declared. An error occurred at , (1, 2).
C:\PlantStructure.xml(1): Visual Studio could not locate a schema for this 
document. Validation can only ensure this is a well formed XML document and 
cannot validate the data against a schema.
...

Both files are localed under c:\ 
My VS.net 2003 build number is 7.1.3088, and .net framework is 1.1.4322

Can anyone help me to figure it out?
Thanks

PlantStructure.xsd:
<?xml version="1.0"?>
<xsd:schema id="aprs" targetNamespace="urn:myschema-aprs" 
xmlns="urn:myschema-aprs" xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" 
attributeFormDefault="unqualified" elementFormDefault="qualified">
	<xsd:simpleType name="ItemTag">
		<xsd:restriction base="xsd:string">
			<xsd:minLength value="0"/>
			<xsd:maxLength value="100"/>
		</xsd:restriction>
	</xsd:simpleType>
	<xsd:simpleType name="Active">
		<xsd:restriction base="xsd:int">
			<xsd:minInclusive value="0"/>
			<xsd:maxInclusive value="1"/>
		</xsd:restriction>
	</xsd:simpleType>
	<xsd:simpleType name="ObjectType">
		<xsd:restriction base="xsd:int">
			<xsd:minInclusive value="1"/>
			<xsd:maxInclusive value="2"/>
		</xsd:restriction>
	</xsd:simpleType>
	<xsd:simpleType name="ObjectName">
		<xsd:restriction base="xsd:string">
			<xsd:minLength value="0"/>
			<xsd:maxLength value="50"/>
		</xsd:restriction>
	</xsd:simpleType>
	
  <xsd:element name="PlantStructure" msdata:IsDataSet="true" 
msdata:EnforceConstraints="False">
    <xsd:complexType>
      <xsd:choice maxOccurs="unbounded">
        <xsd:element name="Object">
          <xsd:complexType>
            <xsd:attribute name="ObjectID" type="ItemTag" />
            <xsd:attribute name="ObjectType" type="ObjectType" />
            <xsd:attribute name="ParentID" type="ItemTag" />
            <xsd:attribute name="ObjectName" type="ObjectName" />
            <xsd:attribute name="Active" type="Active" />
          </xsd:complexType>
        </xsd:element>
      </xsd:choice>
    </xsd:complexType>
  </xsd:element>
</xsd:schema>


PlantStructure.xml:

<PlantStructure xmlns="urn:myschema-aprs" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="urn:myschema-aprs PlantStructure.xsd">
	<Object ObjectID="./2.1/2.1" ObjectType="1" ParentID="" ObjectName="My 
plant" Active="1" />
	<Object ObjectID="./2.6/2.6" ObjectType="1" ParentID="./2.1/2.1" 
ObjectName="Line 1" 	Active="1" />
	<Object ObjectID="./2.2/2.2" ObjectType="1" ParentID="./2.6/2.6" 
ObjectName="Loop 1" Active="1" />
	<Object ObjectID="./2.3/2.3" ObjectType="1" ParentID="./2.6/2.6" 
ObjectName="Loop 2" Active="1" />
	<Object ObjectID="./2.4/2.4" ObjectType="1" ParentID="./2.6/2.6" 
ObjectName="Loop 3" Active="1" />
</PlantStructure>