Sorry guys, I missed some of the posts, thus I didn't answer all the questions entirely.
And as I speak "Southern" most of the time, I'm sometimes hard to understand.
The project plays all clips (project) without interruption when played on the pc (reviewing in VS11 and the MPEG file using Windows Media Player).
I am burning at 4x.
The DVDs I am using are: Office Depot brand DVD-RW and when that didn't work, I purchased some Maxell DVD+R.
I haven't done anything in the preview window (after clicking on Create Disc) except to view the complete project by clicking on the Preview button. Did not adjust the trimmers at all.
I've been trying to edit out "corruptness", but I've eliminated so many clips and portions of clips from my project trying to find the "corrupt" one, that I don't have a lot of video left!!

And it's a really long process to cut out a small portion, burn to dvd and see if it works and then go back and cut out another small portion, burn to dvd and see if it works, etc etc.
I've been needing a new desktop...so I went and purchased a new one with a DVD burner, so I think I'll start from the beginning (clips straight from camera) on the new computer and see what happens. From what you all had said, I made sure that the burner on the new computer would burn down to 4x. Also, I had the new computer loaded NOT with Vista, but with XP. I have Vista on this laptop and I don't particularly like it.
I sure do appreciate all the help!!!
Mega thanks!
Sharon