I have a WCF method that is not receiving the request parameters. But if I use the WCFTest client (the one that comes with visual studio) the method receives the parameters.

If I capture the requests, they look very similar:

If the request is this, it works:

<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
    <s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
        <consultaValeCompra xmlns="http://tempuri.org/">
            <dataMovto>1</dataMovto>
            <numSeqOperacao>2</numSeqOperacao>
            <numDocumento>3</numDocumento>
            <valorDocumento>4</valorDocumento>
            <tipo>5</tipo>
            <codPreVenda>6</codPreVenda>
        </consultaValeCompra>
    </s:Body>
</s:Envelope>

If the request is this, I do not get the parameters:

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <soapenv:Body>
        <consultaValeCompra xmlns="http://valeCompra/jaws">
            <dataMovto>121212</dataMovto>
            <numSeqOperacao>003719</numSeqOperacao>
            <numDocumento>000000000000005555466465454546</numDocumento>
            <valorDocumento>000046400</valorDocumento>
            <tipo>0</tipo>
            <codPreVenda>0000000000</codPreVenda>
        </consultaValeCompra>
    </soapenv:Body>
</soapenv:Envelope>

The method signature is:

public Retorno consultaValeCompra(string dataMovto, string numSeqOperacao, string numDocumento, string valorDocumento, string tipo, string codPreVenda)

I can spot the differences, but I cannot understand why the first works and the second does not.

What can I do to make it work?

Thanks.