Generate Client fails using DataSvcUtil

Hello,

I am trying to generate Client manually using DataSvcUtil.exe. The command is getting executed but it is failing to generate client. Below is my command and screen shot:

"%windir%\Microsoft.NET\Framework\v4.0.30319\DataSvcUtil.exe /dataservicecollection /version:2.0 /language:CSharp /out:D:\Downloads\MyService.cs /uri:http://localhost:9999/MyService.svc/