Get-AzureVM giving Exception

Hi , Whenever i am executing Below command through Azure Power Shell , 

I am getting below exception 

PS C:\> Get-AzureVM -ServiceName "MySvc1"
Get-AzureVM : An error occurred while sending the request.
At line:1 char:1
+ Get-AzureVM -ServiceName "MySvc1"
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : CloseError: (:) [Get-AzureVM], HttpRequestException
    + FullyQualifiedErrorId : Microsoft.WindowsAzure.Commands.ServiceManagement.IaaS.GetAzureVMCommand

Not sure what is wrong here.