DVD buns several times but now it won't?

OK, this is weird. I made a movie and burned 4 copies to dvd, all played
well and I know at least one of them played in a DVD player. Anyway, I sent
all four off and figured I would make one for myself later as it takes oh
half hour or so. So about a week later (today) I go to copy to DVD and I
get this error message:

"Window's movie maker cannot save the movie to the specified location.
Verify that the original source files in your movie are still available,
that the saving location is still available, and that there is enough free
disk space available, and then try again."

Funny thing is, it puts a new movie file in the folder where all the files
are so it knows where it is.

So I tried saving it every other way with the same result. I have not moved
or changed anything and the movie plays fine from movie maker. Any
ideas...besides get a DVD back and copy it?

--
Bossgobbler...