Getting 'Generic failure' error in ManagementClass.GetInstances()

[sachinrohamare]

I am getting following error while iterating through the ManagementObjec tCollection:
This error is coming only for the first time. From the 2nd run onwards the code is executed successfully. Surprisingly when I execute the code with the gap of 20-25 minutes the error is reproducible!

Please provide the solution urgently.

Thanks in Advance !

Please check the error details, sample C# code I am using.

Regards,

Sachin R.
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Error Details: 

ManagementException Error: Generic failure
ManagementException Error code: Failed
ManagementException ErrorInformation: System.Management.ManagementBaseObject
ManagementException Error:    at System.Management.ManagementException.ThrowWith
ExtendedInfo(ManagementStatus errorCode)
   at System.Management.ManagementObjectEnumerator.MoveNext()
   at TestWMI.Class2.Main(String[] args)

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C# Code:
Description: Using following C# code: Problematic code line is marked in bold tag.

			try 
			{
				string machineName = "dnsMachineName";
				System.Net.IPHostEntry iphe = System.Net.Dns.Resolve(machineName);
				string DnsServerName = iphe.HostName;
				string NameSpace = "\\\\" + DnsServerName + "\\root\\MicrosoftDNS";
				System.Management.ManagementScope EManagementScope = new System.Management.ManagementScope( NameSpace);
				EManagementScope.Connect();
				ManagementPath EZonePath = new ManagementPath("\\root\\MicrosoftDNS:MicrosoftDNS_Zone");
				ObjectGetOptions EGetOptions = new ObjectGetOptions();
				ManagementClass EManagementClass = new ManagementClass(EManagementScope , EZonePath, EGetOptions);
				ManagementObjectCollection mgmObjcoll =  EManagementClass.GetInstances();
				[B]foreach (ManagementObject MyZoneObj in EManagementClass.GetInstances()) [/B] 				{
					Console.WriteLine(MyZoneObj.Path);
					break;
				}
			}
			catch(ManagementException ex) 
			{
				Console.WriteLine("ManagementException Error: "+ex.Message);
				Console.WriteLine("ManagementException Error code: "+ex.ErrorCode);
				Console.WriteLine("ManagementException ErrorInformation: "+ex.ErrorInformation);
				Console.WriteLine("ManagementException Error: "+ex.StackTrace);
			}