Multisession problem with nero 8

i was happy using nero 6, until i switched to nero 8.Now the problem i am facing is a bit unusual.

i burned several data dvds in multisession mode and when i insert the same dvd to add more files it shows a “crossed” sign against each file in disc content-does this mean the files werent burned properly???

but it plays absolutely well and also gets copied and pasted

so y this “cross” sign agains each file in disc content in nero 8 express