Error in building a process in Designer

I am using Wm 7.1.1. I created a simple process in the designer. On building, It throwed an error as following.

Error: Build of process “Hello” failed. Please check the log file for more information.
com.webmethods.process.generator.exception.GenerationException: "Error accessing services in the WmPRT Package. Please make sure WmPRT package is installed and enabled on your IS connected to the logical server “{0}”.Default
at com.webmethods.process.generator.PRTFragmentGenerator.generatePRTFragments(

Kindly help me out.

have you configured the logical server?

Also Configure the JDBC pools and the functional defintions on the IS admin page.