Automation wont run

I have recently updated to 5.1 build2774. I have a problem.
Player 1 plays with player 2 indicating 'cued, player 1 finishes and player 2 changes to 'on air, but nothing happens. It dosent actually play. everything was fine till I tried to use VT earlier today. What have I done wrong?

Dave

Problem solved… It appeared to be a conflict with mic input for voice tracking. Now VT wont work 'Error opening BASS 0 cant find free sound driver (BASS error3)