I can't see the files I just burned on a DVD-R with Nero...

[mistiqutz]

I used Nero 6 (Toshiva DVD-RW 4x/2x...) to burn a
multisession for the first time yesterday. Just as I
hit the 'burn' button Nero poppoed up a warning
saying...:

"You are about to create a multisession write once dvd
disc. Session 2 and more will not be readable on some
DVD-ROM drives and on OS's before Windows XP"

I click on ok and it goes ahead and burns.

Later, when I tried to access the DVD with Windows
Explorer, it just looked empty. No files, no anything.
The DVD size was 0, free space 0. weird.

but the weirdest thing is that when I try to open the
DVD, as a multi-session DVD in Nero (even though I
remember perfectly selecting the finalize button when
Nero prompted me to during the first burning), I can
see all my files right there!

Can anyone make me understand !?

P.S. And also, if I try, with Nero, to burn more than
700 mb's (that fit a cd) it says there's not enough
available space... and there is 4,7 gb to write...

[Capmaster]

I used Nero 6 (Toshiva DVD-RW 4x/2x...) to burn a
multisession for the first time yesterday. Just as I
hit the 'burn' button Nero poppoed up a warning
saying...:

"You are about to create a multisession write once dvd
disc. Session 2 and more will not be readable on some
DVD-ROM drives and on OS's before Windows XP"

I click on ok and it goes ahead and burns.

Later, when I tried to access the DVD with Windows
Explorer, it just looked empty. No files, no anything.
The DVD size was 0, free space 0. weird.

but the weirdest thing is that when I try to open the
DVD, as a multi-session DVD in Nero (even though I
remember perfectly selecting the finalize button when
Nero prompted me to during the first burning), I can
see all my files right there!

Can anyone make me understand !?

P.S. And also, if I try, with Nero, to burn more than
700 mb's (that fit a cd) it says there's not enough
available space... and there is 4,7 gb to write...

Judging by what you said and what Nero reported in the error notice, it sounds like you're trying to write a DVD-R as a multisession disc and then finalizing when you do the first burn. My questions are:

1) Why are you trying to burn a multisession DVD-R?
2) If you are really burning a DVD-RW, why are you trying to finalize it? That option is only for write-once discs.

Nero 6 has some bugs. Try this if you can: Uninstall just the Nero Burning Rom part of Nero 6 and install an older Nero - even a trial you can get free if you don't have a licensed copy. Then try it again. I was getting all sorts of funky errors with NBR6 that I never got with ver. 5.5.9.X.