Исключение создания контейнера блоба

Я получаю исключение каждый раз, когда я пытаюсь создать контейнер для блоба

использование следующего кода

CloudStorageAccount storageAccInfo;
CloudBlobClient blobStorageType;
CloudBlobContainer ContBlob;

blobStorageType = storageAccInfo.CreateCloudBlobClient();

//then I initialize storageAccInfo

ContBlob = blobStorageType.GetContainerReference(containerName);
//everything fine till here ; next line creates an exception

ContBlob.CreateIfNotExist();

Microsoft.WindowsAzure.StorageClient.StorageClientException was unhandled
  Message="One of the request inputs is out of range."
  Source="Microsoft.WindowsAzure.StorageClient"
  StackTrace:
       at Microsoft.WindowsAzure.StorageClient.Tasks.Task`1.get_Result()
       at Microsoft.WindowsAzure.StorageClient.Tasks.Task`1.ExecuteAndWait()
       at Microsoft.WindowsAzure.StorageClient.TaskImplHelper.ExecuteImplWithRetry[T](Func`2 impl, RetryPolicy policy)
       at Microsoft.WindowsAzure.StorageClient.CloudBlobContainer.CreateIfNotExist(BlobRequestOptions options)
       at Microsoft.WindowsAzure.StorageClient.CloudBlobContainer.CreateIfNotExist()
       at WebRole1.BlobFun..ctor() in C:\Users\cloud\Documents\Visual Studio 2008\Projects\CloudBlob\WebRole1\BlobFun.cs:line 58
       at WebRole1.BlobFun.calling1() in C:\Users\cloud\Documents\Visual Studio 2008\Projects\CloudBlob\WebRole1\BlobFun.cs:line 29
       at AzureBlobTester.Program.Main(String[] args) in C:\Users\cloud\Documents\Visual Studio 2008\Projects\CloudBlob\AzureBlobTester\Program.cs:line 19
       at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: System.Net.WebException
       Message="The remote server returned an error: (400) Bad Request."
       Source="System"
       StackTrace:
            at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
            at Microsoft.WindowsAzure.StorageClient.EventHelper.ProcessWebResponse(WebRequest req, IAsyncResult asyncResult, EventHandler`1 handler, Object sender)
       InnerException: 

Если бы Вы парни knw, что я делаю неправильно?