Sense code errors are almost always caused by some piece of software interfering in the communication problem between Encore and the burner.
Please have a look at Things and Software to avoid when authoring for DVD-V.Sense Code 52102
I had exactly the same issue and it was resolved thanks to the very helpful suggestion by Ruud Blauw - turning off the autorun functions on the DVD drive in XP sorted it out. Thanks to Ruud and the fabulous Adobe Forums.
Anybody know how to solve this on a mac?
Yours Anders Kjems
You may have to interpolate a bit from Ruud's suggestions, to fit the Mac, but with a ''sensecode'' error, it is likely that you are experincing a problem with your burner, or the media you are attempting to burn to. I believe that both of these issues are addressed in Ruud's link. Sorry that I do not know the specifics of Mac systems, so someone else will have to translate from PC-speak to Mac-speak. Beyond the basics of confirming all the mechanics and the electronics (firmware, etc.) in your burner and using good media, I cannot offer anything more for a Mac. Sorry.