GeneratePDFService quick start code issue

Hi,

I am getting a build error, while using quick start code for converting the native document into PDF document through webservice api.

error: The type or namespace TestPDFG8WS couldn't found

In the quickstart code, it is using TestPDFG8WS as namespace as you can see below a line of code.
using TestPDFG8WS.GeneratePDFService;

Any idea, what reference we have to add to fix the issue ?.

refer the following link to see the quickstarts code .
http://livedocs.adobe.com/livecycle/es/sdkHelp/programmer/sdkHelp/wwhelp/wwhimpl/common/ht ml/wwhelp.htm?context=sdkHelp&file=quickStarts_GeneratePDF.11.1.html

Regards,
Arvind