SOAP CLIENT and HEADER

hi All, I'm trying to access a SOAP service but i have one doubt. I paste a sample SOAP request for you know the problem: //---------------- START SOAP REQUEST POST /wbm/shopping/script/CalcPrecoPrazo.asmx HTTP/1.1 Host: shopping.correios.com.br Content-Type: text/xml; charset=utf-8 Content-Length: length SOAPAction: "http://tempuri.org/CalcPrecoPrazo" //NOTE THIS LINE <?xml version="1.0" encoding="utf-8"?> <soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"> <soap:Body> <CalcPrecoPrazo xmlns="http://tempuri.org/"> <nCdEmpresa>string</nCdEmpresa> <sDsSenha>string</sDsSenha> <nCdServico>string</nCdServico> <sCepOrigem>string</sCepOrigem> <sCepDestino>string</sCepDestino> <nVlPeso>string</nVlPeso> <nCdFormato>int</nCdFormato> <nVlComprimento>decimal</nVlComprimento> <nVlAltura>decimal</nVlAltura> <nVlLargura>decimal</nVlLargura> <nVlDiametro>decimal</nVlDiametro> <sCdMaoPropria>string</sCdMaoPropria> <nVlValorDeclarado>decimal</nVlValorDeclarado> <sCdAvisoRecebimento>string</sCdAvisoRecebimento> </CalcPrecoPrazo> </soap:Body> </soap:Envelope> //---------------- END SOAP REQUEST Ok. Now i'm creating the soap client: $client = new SoapClient(null, array('location' => "http://shopping.correios.com.br/wbm/shopping/script/CalcPrecoPrazo.asmx", 'uri' => "http://localhost/")); //I need set the a header for this request: SOAPAction: "http://tempuri.org/CalcPrecoPrazo", right? How can i do it ? I tried something like this but not worked. $header = new SoapHeader('http://tempuri.org/CalcPrecoPrazo', 'SOAPAction', null); $client->__setSoapHeaders($header); Someidea? $results = $client->CalcPrecoPrazo($empresaCod, $empresaSenha, $codigoFrete, $cepOrigem, $cepDestino, $peso, (int)$formatoCd, (int)$comprimento, (int)$altura, (int)$largura, (int)$VlDiametro, $codMaoPropria, (float)$valor, $codAvisoRecebimento); thanks Augusto Morais