Get-AzureVM went wrong

I have installed Azure Powershell Module, and I have import azurepublishsettingfile , I can get my subscribtion with get-azuresubscritpion. But when I run "get-azurevm" ,there is an error pop out:

Get-AzureVM : MissingOrIncorrectVersionHeader: The versioning header is not specified or was specified incorrectly.
所在位置 行:1 字符: 1
+ Get-AzureVM
+ ~~~~~~~~~~~
    + CategoryInfo          : CloseError: (:) [Get-AzureVM]，CloudException
    + FullyQualifiedErrorId : Microsoft.WindowsAzure.Commands.ServiceManagement.IaaS.GetAzureVMCommand