"Test Console" service is not running. Contact administrator to start this service.
So to clarify, Test console will work only when OSB server (one of the managed server and default name is osb_server1) is up and running (Along with admin server); and all deployments on OSB server are in active state.
In 11g, few things are different than 10g. Now in 11g, you may access the sbconsole by just starting the admin server but remember that all the OSB configurations will be deployed on the OSB server (osb_server1) only. So for any OSB resource to be available for outside n/w, it is required that OSB server is up and running.
To start the OSB server,
Open command prompt. Navigate to $Domain_Home/bin and run command
startManagedWeblogic.cmd
for eg. -
D:\OFMW11g\mw\user_projects\domains\ofmw_domain\bin>startManagedWebLogic.cmd osb_server1
Once this server is up and running, try using test console.
You may also refer -
http://forums.oracle.com/forums/thread.jspa?threadID=1093465&tstart=15