在.NET中访问UMLS UTS web服务时出现问题

我正在尝试编写一个使用.NET中的UMLS UTS web服务的小型测试应用程序 然而，UMLSKS服务中的所有方法，如FindCuiByNormalWord、FindCuiByNormalString，似乎都返回null。我已检查CAS身份验证服务是否返回了正确的代理票证

        CASService.AuthorizationPortTypeClient CasClient = new AuthorizationPortTypeClient();
        UMLSKS.UMLSKSServicePortTypeClient UmlsKsClient = new UMLSKSServicePortTypeClient();
        string ticket = CasClient.getProxyGrantTicket("<my user name>", "<my password>");
        string proxyTicket = CasClient.getProxyTicket(ticket, "http://umlsks.nlm.nih.gov");
        string umlsVersion = UmlsKsClient.getCurrentUMLSVersion(new CurrentUMLSRequest() { casTicket = proxyTicket });
        ConceptIdGroup cidG = UmlsKsClient.findCUIByNormWord(new ConceptIdNormWordRequest() { casTicket = proxyTicket, release = umlsVersion, searchString = query }); 

CASService.AuthorizationPortTypeClient CasClient=newauthorizationporttypeclient（）；
UMLSKS.UMLSKSServicePortTypeClient UmlsKsClient=新的UMLSKSServicePortTypeClient（）；
string ticket=CasClient.getProxyGrantTicket（“，”）；
字符串proxyTicket=CasClient.getProxyTicket（票证，“http://umlsks.nlm.nih.gov");
字符串umlsVersion=UmlsKsClient.getCurrentUMLSVersion（新的CurrentUMLSRequest（）{casTicket=proxyTicket}）；
ConceptIdGroup cidG=UmlsKsClient.FindCuiByNormalWord（新的ConceptIdNormalWordRequest（）{casTicket=proxyTicket，release=umlsVersion，searchString=query}）；

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有人能指出我哪里出了问题吗？

Duh！这张票是按电话发出的。一切都很好