The audition room and the film/tv set are totally different settings.  Winning the role (the audition)demands radically different approaches in attitude, preparation and performance.
Check out our Breakthrough Series -  A lively Q& A video series featuring film/tv veteran GregAlan Williams sharing an insiders view of How To Build A Successful Acting Career. Part One – THE AUDITION View the complete 3 part series here - http://actorsbreakthrough.com/2011/01/breakthrough-series/