Issue with creating a proxy assembly for WCF services

Hi

I am in the process of creating a proxy assembly for WCF services (Project Server 2010) and followed instructions as per below URL

http://msdn.microsoft.com/en-us/library/ff621594.aspx#pj14_CreateProxyAssembly_UsingWebConfig

Getting an error when i ran GenWCFProxyAssembly.cmd in Visual studio command prompt as well as DOS command prompt

Please make a note, i have unzipped Source.zip under Documentation\Intellisense\WCF (path )

Did i missed out any thing

Kindly help me with this, trying to do this for the past 5 days

Regards

Santosh