SLsvcUtil.exe not working in VS 2012

I use SLsvcUtil.exe to create my WCF proxy class and now that I upgraded to a new computer and from VS 2010 to 2012 - it no longer works.  Normally I have a cmd file with the following text in it:

SLsvcUtil.exe /slsvcutilConfig:client.config http://localhost/xxxxx/WebServices\Company/CompanyService.svc
copy CompanyService.cs "D:\Apps\xxxxx\App\UIControls\ProxyWrapper\Company\"
copy ServiceReferences.ClientConfig "D:\Apps\xxxxx\App\UIControls\ProxyWrapper\Company\"

Then I would open the VS 2010 command prompt and paste in this text to run it:

D:\Apps\xxxx\App\UIControls\ProxyWrapper\Company\Tools\ProxyGen_CompanyService.cmd

and life was good.  but now on the new machine and after updating the paths, I get the following error msg in the command window:

C:\Program Files (x86)\Microsoft Visual Studio 11.0>SLsvcUtil.exe /slsvcutilConf
ig:client.config http://localhost/xxxxx/WebServices\Company/CompanyServic
e.svc 'SLsvcUtil.exe' is not recognized as an internal or external command,
operable program or batch file.

Why would 'SLsvcUtil.exe' not be recognized?

Thank you.