Procedure 'base64Binary' not present Error

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ASP.NET

webservice

Hello there.

I am trying to send data to a remote location which is not in the same network via web service(using soap header).I am writing code in asp.net 3.5 and the remote location uses php.

I added his reference to my project as web referance and whenever I try to call "sendIktsData" it throws an exception saying that : "Procedure 'base64Binary' not present".

So I googled and try to find some answers but I can't find anything yet.
I asked the person who made the wdsl, he said the service works and send me another web page that calls the service and it looks like the service works. (The page is also made in php by the way)

So what could be the problem? My guess is he should have add something into this service. (You see I am totally clueless)

So here is the wsdl I hope you can help me if something is missing in here :

<?xml version="1.0" encoding="utf-8"?>
<wsdl:definitions xmlns:tns="http://xx.xx.xx.xx/tiks-servis/"
                  xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
                  xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/"
                  xmlns:xsd="http://www.w3.org/2001/XMLSchema"
                  xmlns="http://schemas.xmlsoap.org/wsdl/"
                  name="IktsData"
                  targetNamespace="http://xx.xx.xx.xx/tiks-servis/"
                  xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/">
  <wsdl:types />
  <wsdl:message name="sendIktsDataRequest">
    <wsdl:part name="data2" type="xsd:base64Binary" />
  </wsdl:message>
  <wsdl:message name="sendIktsDataResponse">
    <wsdl:part name="Result" type="xsd:base64Binary" />
  </wsdl:message>
  <wsdl:portType name="IktsDataPortType">
    <wsdl:operation name="sendIktsData">
      <wsdl:input message="tns:sendIktsDataRequest" />
      <wsdl:output message="tns:sendIktsDataResponse" />
    </wsdl:operation>
  </wsdl:portType>
  <wsdl:binding name="IktsDataBinding" type="tns:IktsDataPortType">
    <soap:binding transport="http://schemas.xmlsoap.org/soap/http" />
    <wsdl:operation name="sendIktsData">
      <soap:operation soapAction="urn:xmethods-delayed-quotes#sendIktsData" />
      <wsdl:input>
        <soap:body use="encoded" namespace="urn:xmethods-delayed-quotes" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" />
      </wsdl:input>
      <wsdl:output>
        <soap:body use="encoded" namespace="urn:xmethods-delayed-quotes" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" />
      </wsdl:output>
    </wsdl:operation>
  </wsdl:binding>
  <wsdl:service name="IktsDataService">
    <wsdl:port name="IktsDataPort" binding="tns:IktsDataBinding">
      <soap:address location="http://xx.xx.xx.xx/tiks-servis/server2.php" />
    </wsdl:port>
  </wsdl:service>
</wsdl:definitions>