Advanced analysis not working?

got a sony dvd burner that came with nero 6. burned a couple of my dvd’s so i would have backups of them. went to bed after shutting off my pc and the next day when i went to burn more movies the entire area where the advanced analysis option is given was greyed out. i tried running a registry cleaner, i tried a disk cleanup of my c drive and even uninstalled nero and reinstalled it. still cannot get it to work anymore. any ideas?

Are the DVD’s under 4.7gb? They won’t need advanced analysis…?