NERO Express ver. 188.8.131.52 that came bundled with my Lite-On burner. Select DVD-Video,I get all of the files loaded (.VOB, .BUP and .IFO files), click on the next button and get to a screen titled, "final burn settings", but the burn button is "not active", greyed out. Last week I was able to burn a DVD with Nero Express that was a baseball highlight DVD. Just tried it a couple of minutes ago and the burn button is "not active" with these files now either. What am I doing wrong this time?????