First off, there's nothing wrong with your timing on the DVD. You have it at 46:46 with the "Play without Intros" choice selected. Daveytod has his with the intros (just checked both).
As for the scene, It's in a New Hope, it's right after they escape from the Death Star, right before the Tie Fighter fight. Luke is sulking because Obi-Wan just died, and Leia is comforting him. I've just checked both the SE DVDs and the GOUT, they both have it. Go to chapter 39 on either and rewind a little bit.