Check your jbpm-console.properties file in jbpm-gwt-console-server.war/WEB-INF/lib/jbpm-gwt-core.jar file.
It should point to your Guvnor properly.
Check whether the Guvnor-IP and Guvnor-Host is correct.
Check for guvnor-package is the package where your process resides,by default it is "defaultPackage".
Make sure that you built the package.