I wrote this schema for Excel but am getting a more than one root node issue 
error.  I'm not finding where the error is, however.  Please help:

<?xml version='1.0' encoding='UTF-8'?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
	<xsd:annotation>XSD Schema generated with Excel XML Toolbox</xsd:annotation>
	<xsd:element nillable="true" name="DTS_Detail">
		<xsd:complexType>
			<xsd:sequence minOccurs="0">
				
				<xsd:element minOccurs="0" nillable="true" type="xsd:double" 
name="REC_NUM" form="qualified"/>
				<xsd:element name="SERVICE_ADDRESS" minOccurs="0" nillable="true" 
form="qualified">
					<xsd:simpleType>
						<xsd:restriction base="xsd:string">
							<xsd:maxLength value="10"/>
						</xsd:restriction>
					</xsd:simpleType>
				</xsd:element>

				<xsd:element name="SITE_UNIT_NO" type="xsd:string" minOccurs="0" 
nillable="true" form="qualified"/>
				
				<xsd:element name="COST_OF_SEALING" type="xsd:string" minOccurs="0" 
nillable="true" form="qualified"/>
						
			</xsd:sequence>
		</xsd:complexType>
	</xsd:element>
</xsd:schema>