I have the following schema:

<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:tipos="http://www.ginfes.com.br/tipos_v03.xsd"  targetNamespace="http://www.ginfes.com.br/servico_consultar_situacao_lote_rps_resposta_v03.xsd"
            xmlns="http://www.ginfes.com.br/servico_consultar_situacao_lote_rps_resposta_v03.xsd" attributeFormDefault="unqualified" elementFormDefault="qualified">
 <xsd:import schemaLocation="tipos_v03.xsd" namespace="http://www.ginfes.com.br/tipos_v03.xsd" />
 <xsd:element name="ConsultarSituacaoLoteRpsResposta">
  <xsd:complexType>
   <xsd:choice>
    <xsd:sequence>
     <xsd:element name="NumeroLote" type="tipos:tsNumeroLote" minOccurs="1" maxOccurs="1"/>
     <xsd:element name="Situacao" type="tipos:tsSituacaoLoteRps" minOccurs="1" maxOccurs="1"/>
    </xsd:sequence>
    <xsd:element ref="tipos:ListaMensagemRetorno" minOccurs="1" maxOccurs="1"/>
   </xsd:choice>
  </xsd:complexType>
 </xsd:element>
</xsd:schema>

and the following class:

[System.CodeDom.Compiler.GeneratedCodeAttribute("xsd", "2.0.50727.3038")]
[System.SerializableAttribute()]
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.ginfes.com.br/servico_consultar_situacao_lote_rps_envio_v03.xsd")]
[System.Xml.Serialization.XmlRootAttribute(Namespace = "http://www.ginfes.com.br/servico_consultar_situacao_lote_rps_envio_v03.xsd", IsNullable = false)]
public partial class ConsultarSituacaoLoteRpsEnvio
{
    [System.Xml.Serialization.XmlElementAttribute(Order = 0)]
    public tcIdentificacaoPrestador Prestador { get; set; }

    [System.Xml.Serialization.XmlElementAttribute(Order = 1)]
    public string Protocolo { get; set; }
}

Use the following code to deserialize the object:

XmlSerializer respSerializer = new XmlSerializer(typeof(ConsultarSituacaoLoteRpsResposta));
StringReader reader = new StringReader(resp);
ConsultarSituacaoLoteRpsResposta respModel = (ConsultarSituacaoLoteRpsResposta)respSerializer.Deserialize(reader);

does not occur any error but the properties of objects are null, anyone know what is happening?