有关wmi的dns操作，下面代码为什么会是通用错误……

ConnectionOptions CO = new ConnectionOptions();
ManagementScope s = new ManagementScope(@"\\localhost\root\MicrosoftDNS", CO);
ManagementPath p = new ManagementPath("MicrosoftDNS_AType");
s.Connect();
ObjectGetOptions o = new ObjectGetOptions();
ManagementClass c = new ManagementClass(s, p, o);
ManagementBaseObject inParams = c.GetMethodParameters("CreateInstanceFromPropertyData");
inParams["DnsServerName"] = "localhost";
inParams["ContainerName"] = "test.ru";
inParams["OwnerName"] = "sss.test.ru";
inParams["IPAddress"] = "1.2.3.5";
ManagementBaseObject outParams = c.InvokeMethod("CreateInstanceFromPropertyData", inParams, null);

到最后一句出错……

说明: 执行当前 Web 请求期间，出现未处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。

异常详细信息: System.Management.ManagementException: 通用故障


要如何解决？