Couple of Possibilites,
1. Try rendering the full movie.
2. or Render 1 light source to the clip and render to a new movie. Render 2nd light to new movie and create yet another new movie then render final light to that.
Good luck 
__________________ IBM A51p with 160Gb Boot Disk, 160Gb external Firewire Disk, 2Gb Memory and a super duper sound card, 17\" TFT Monitor etc etc etc Sony TRV33e : Sony TRV310e : Canon XM2 ULead products mostly including Mediastudio Pro (V8.0), Video Studio 8, Movie Factory 2.0, Premiere Elements Remember, there is always more to learn than there is to teach. |