The SOAP API call below only displays Folder names. Does anybody know how to retrieve the list of data extension within a folder?

<Body>
		<RetrieveRequestMsg xmlns="http://exacttarget.com/wsdl/partnerAPI">
			<RetrieveRequest>
				 <ObjectType>DataFolder</ObjectType>
                <!--<Properties>ID</Properties> -->
                <Properties>Description</Properties>
                <Properties>ParentFolder.Description</Properties>
                <!--<Properties>Client.ID</Properties> -->
                <Properties>ParentFolder.CustomerKey</Properties>
                <Properties>Name</Properties>
                <Properties>ContentType</Properties>
                <Properties>ParentFolder.Name</Properties>
                <Properties>ParentFolder.ID</Properties>
                <!--<Properties>ObjectID</Properties>
                <Properties>ParentFolder.ObjectID</Properties>-->
                
                <Filter xsi:type="par:ComplexFilterPart" xmlns:par="http://exacttarget.com/wsdl/partnerAPI">
               <LeftOperand xsi:type="par:SimpleFilterPart">
                  <Property>ParentFolder.Name</Property>
                  <SimpleOperator>equals</SimpleOperator>
                  <Value>FOLDER NAME</Value>
               </LeftOperand>
               <LogicalOperator>AND</LogicalOperator>
               <RightOperand xsi:type="par:SimpleFilterPart">
                  <Property>ContentType</Property>
                  <SimpleOperator>equals</SimpleOperator>
                  <Value>dataextension</Value>
               </RightOperand>
            </Filter>
                <QueryAllAccounts>false</QueryAllAccounts>
			</RetrieveRequest>
		</RetrieveRequestMsg>
	</Body>