Estou recebendo esse erro quando executo uma compilação fora do Visual Studio:

"Uma propriedade com o nome 'httpRequest' não está presente"

Se eu executar o mesmo código no Visual Studio, ele funcionará. Alguém tem uma idéia do que estou fazendo de errado?

Meu app.config:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0" />
  </startup>
  <system.serviceModel>
    <bindings>
      <basicHttpBinding>
        <binding name="CacheServiceEndpoint" />
        <binding name="consultaWebServicePortBinding" maxBufferPoolSize="524288" maxBufferSize="10485760"
  maxReceivedMessageSize="10485760">
          <readerQuotas maxDepth="32" maxStringContentLength="10485760"
            maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" />
          <security mode="Transport" />
        </binding>
        <binding name="consultaWebServicePortBinding1" />
      </basicHttpBinding>
      <customBinding>
        <binding name="CustomBinding_ICacheService">
          <binaryMessageEncoding />
          <httpTransport />
        </binding>
      </customBinding>
    </bindings>
    <client>
      <endpoint address="http://....svc"
          binding="basicHttpBinding" bindingConfiguration="CacheServiceEndpoint"
          contract="Cache.ICacheService" name="CacheServiceEndpoint" />
      <endpoint address="http://.../binary"
          binding="customBinding" bindingConfiguration="CustomBinding_ICacheService"
          contract="Cache.ICacheService" name="CustomBinding_ICacheService" />
      <endpoint address="https://..."
          binding="basicHttpBinding" bindingConfiguration="consultaWebServicePortBinding"
          contract="ABC.consultaWebService" name="consultaWebServicePort" />
    </client>
  </system.serviceModel>
</configuration>

O que estou fazendo para fazer uma ligação:

svc = new consultaWebServiceClient ("consultaWebServicePort");                    
svc.Endpoint.Behaviors.Add (new CustomEndpointBehavior (user, psw));

Obrigado!