WP7：从Windows Phone 7调用webservice时出错

Question

我正在为Windows Phone 7开发一个应用程序。我试图通过添加服务引用来使用web服务，以便我可以使用它中的函数但是，我收到了这个错误

Error   6   Custom tool error: Failed to generate code for the service reference 'myterraService'.  Please check other error and warning messages for details.  c:\users\khaled\documents\visual studio 2010\Projects\gpsWebservice\gpsWebservice\Service References\myterraService\Reference.svcmap    1   1   gpsWebservice

这里是文件

<?xml version="1.0" encoding="utf-8"?>
<ReferenceGroup xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" ID="56ed3f74-7e58-4e12-8c13-3184488c3335" xmlns="urn:schemas-microsoft-com:xml-wcfservicemap">
  <ClientOptions>
    <GenerateAsynchronousMethods>true</GenerateAsynchronousMethods>
    <EnableDataBinding>true</EnableDataBinding>
    <ExcludedTypes />
    <ImportXmlTypes>false</ImportXmlTypes>
    <GenerateInternalTypes>false</GenerateInternalTypes>
    <GenerateMessageContracts>false</GenerateMessageContracts>
    <NamespaceMappings />
    <CollectionMappings>
      <CollectionMapping TypeName="System.Collections.ObjectModel.ObservableCollection`1" Category="List" />
    </CollectionMappings>
    <GenerateSerializableTypes>false</GenerateSerializableTypes>
    <Serializer>Auto</Serializer>
    <UseSerializerForFaults>true</UseSerializerForFaults>
    <ReferenceAllAssemblies>true</ReferenceAllAssemblies>
    <ReferencedAssemblies />
    <ReferencedDataContractTypes />
    <ServiceContractMappings />
  </ClientOptions>
  <MetadataSources>
    <MetadataSource Address="http://msrmaps.com/TerraService2.asmx" Protocol="http" SourceId="1" />
  </MetadataSources>
  <Metadata>
    <MetadataFile FileName="TerraService2.disco" MetadataType="Disco" ID="8998e6c4-ea3d-4c97-b1f9-da82ea7abb58" SourceId="1" SourceUrl="http://msrmaps.com/TerraService2.asmx?disco" />
    <MetadataFile FileName="TerraService2.wsdl" MetadataType="Wsdl" ID="0507a16b-76e3-4ae8-bf87-8b21697a64d7" SourceId="1" SourceUrl="http://msrmaps.com/TerraService2.asmx?wsdl" />
  </Metadata>
  <Extensions>
    <ExtensionFile FileName="configuration91.svcinfo" Name="configuration91.svcinfo" />
    <ExtensionFile FileName="configuration.svcinfo" Name="configuration.svcinfo" />
  </Extensions>
</ReferenceGroup>