[juabero]

Este es mi app.config

<system.serviceModel>
<bindings>
<basicHttpBinding>
<binding name="siiBinding">
<security mode="Transport" >
<transport clientCredentialType="Certificate" />
</security>
</binding>
<binding name="siiBinding2" />
</basicHttpBinding>
<customBinding>
<binding name="siiBinding">
<textMessageEncoding messageVersion="Soap11" />
<httpsTransport />
</binding>
</customBinding>
</bindings>
<client>
<endpoint address="https://www7.aeat.es/wlpl/SSII-FACT/ws/fe/SiiFactFEV1SOAP"
binding="basicHttpBinding" bindingConfiguration="siiBinding"
contract="ServiceEmitidas.siiSOAP" name="SuministroFactEmitidasPruebas" />
</client>
</system.serviceModel>