Not sure when or how it happened, but the rpeort builder isnt connecting to the report server... And I dont know what the server is? lol

I have SQL server express 2012 insalled and using a local db.. which is fine. And my app loads the reports fine... but in RB 3.0, i click to view the report and it wont work, since its not connected. How do I figure out what the server is (or start it back up?)

Thanks!