src-resolve.4.2: Error resolving component. schéma XML

Bonjour,
J'ai écrit un schéma xml et je me retrouve face à l'erreur suivante :

Code:

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src-resolve.4.2: Error resolving component 'AppModule'. It was detected that 'AppModule' is in namespace 
 'http://www.w3.org/2001/XMLSchema', but components from this namespace are not referenceable from 
 schema document 'file:///C:/workspace/MartesProject/MyXMLSchema.xsd'. If this is the incorrect namespace, 
 perhaps the prefix of 'AppModule' needs to be changed. If this is the correct namespace, then an appropriate 
 'import' tag should be added to 'file:///C:/workspace/MartesProject/MyXMLSchema.xsd'.

Voici un bout de code de mon fichier MyXMLSchema.xsd :

Code:

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<schema xmlns="http://www.w3.org/2001/XMLSchema" 
             targetNamespace="http://www.example.org/MyXMLSchema" 
	     xmlns:tns="http://www.example.org/MyXMLSchema" 
	     elementFormDefault="qualified">
		<element name="Application">
		  <complexType>
		    <sequence>
		      <element name="origin" type="string"/>
		      <element name="name" type="string"/>
		      <element name="appModule" type="AppModule"/>
		    </sequence>
		  </complexType>					
		</element>
		<complexType name="AppModule" >
		  <sequence>
		    <element name="name" type="string"/>
		    <element name="appBehavior" type="AppBehavior" minOccurs="0"/>
		    <element name="AppInterface" type="AppCompInterface"/>
		  </sequence>
		</complexType>
</schema>

Je vous prie de bien vouloir m'aider, car je ne vois pas trop c'est quoi la source de l'erreur.
Merci d'avance.