I haven't burned a DVD for a while and not since I've upgraded my computer. I don't think I've changed any settings in Vegas, so that would be the same. When burning I get the error message-"The drive couldn't determine the correct power for writing the disc. To solve this you need to use a different writing speed or a different brand of media." The details say "A power calibration area error has occurred." I'm using the same dvd's I've always used and I chose the lowest writing speed (2.0) that it lets me. I've always used that speed. I don't know what has changed or what to look at to fix it. Also, what do you recommend setting the dynamic RAM preview to (the default is 16MB)?