救命啊。。....调用java webservice

我用c#调用java 写的webserivce，参数可以穿过去。。但是得不到返回值，每次我的result都变成未定义的值，大虾救命。。我在c#用web引用发布地址
iwest100 aa = new iwest100();
SessionManageResult result1 = new SessionManageResult();
result1 = aa.sessionManage("sdkfjsdfk","sdfkjsdlfj")
wdsl:  <?xml version="1.0" encoding="UTF-8" ?> 
- <wsdl:definitions targetNamespace="http://i.west100.com/v1.0/" xmlns="http://schemas.xmlsoap.org/wsdl/" xmlns:apachesoap="http://xml.apache.org/xml-soap" xmlns:impl="http://i.west100.com/v1.0/" xmlns:intf="http://i.west100.com/v1.0/" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:wsdlsoap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
- <wsdl:types>
- <schema targetNamespace="http://i.west100.com/v1.0/" xmlns="http://www.w3.org/2001/XMLSchema">
  <import namespace="http://schemas.xmlsoap.org/soap/encoding/" /> 
- <complexType name="SessionManageResult">
- <sequence>
  <element name="Result" nillable="true" type="xsd:string" /> 
  </sequence>
  </complexType>
- <element name="SessionManage">
- <complexType>
- <sequence>
  <element name="sessionid" type="xsd:string" /> 
  <element name="userip" type="xsd:string" /> 
  </sequence>
  </complexType>
  </element>
- <element name="SessionManageResponse">
- <complexType>
- <sequence>
  <element name="SessionManageResult" type="impl:SessionManageResult" /> 
  </sequence>
  </complexType>
  </element>
  </schema>
  </wsdl:types>
- <wsdl:message name="sessionManageRequest">
  <wsdl:part element="impl:SessionManage" name="parameters" /> 
  </wsdl:message>
- <wsdl:message name="sessionManageResponse">
  <wsdl:part element="impl:SessionManageResponse" name="parameters" /> 
  </wsdl:message>
- <wsdl:portType name="iwest100Soap">
- <wsdl:operation name="sessionManage" parameterOrder="">
  <wsdl:input message="impl:sessionManageRequest" name="sessionManageRequest" /> 
  <wsdl:output message="impl:sessionManageResponse" name="sessionManageResponse" /> 
  </wsdl:operation>
  </wsdl:portType>
- <wsdl:binding name="iwest100SoapSoapBinding" type="impl:iwest100Soap">
  <wsdlsoap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http" /> 
- <wsdl:operation name="sessionManage">
  <wsdlsoap:operation soapAction="" /> 
- <wsdl:input name="sessionManageRequest">
  <wsdlsoap:body namespace="http://i.west100.com/v1.0/" use="literal" /> 
  </wsdl:input>
- <wsdl:output name="sessionManageResponse">
  <wsdlsoap:body namespace="http://i.west100.com/v1.0/" use="literal" /> 
  </wsdl:output>
  </wsdl:operation>
  </wsdl:binding>
- <wsdl:service name="iwest100">
- <wsdl:port binding="impl:iwest100SoapSoapBinding" name="iwest100Soap">
  <wsdlsoap:address location="http://61.178.85.3/services/iwest100Soap" /> 
  </wsdl:port>
  </wsdl:service>
  </wsdl:definitions>