Class not registered is a CODEC issue. Perhaps the divx isn't loaded correctly or doesn't have the correct codec for that particular file.

To play, might I recommend VLC (has in-built codecs). At least as a backup player. It's very good for previewing videos.
Also get GSpot as this will tell you which codec is required for a particular video file. See links for these here CODECs list and alternate players for Movies

As for burning, well it depends on your particular burner software & its version. For Nero, you should have version 6 or 7. For Roxio, the previous 2-3 versions should do fine. With nero 5 I think you need extra codec plug-ins. You may need to look at updates for your codecs & burner.

I noticed someone just posted this tip for burning: http://www.gnutellaforums.com/showth...threadid=47500

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The secret to creativity is knowing how to hide your sources. -- Albert Einstein
When facts don't fit the theory, change the facts. -- Albert Einstein
Religion keeps the poor from murdering the rich. -- Napoleon Bonaparte
The important thing is not to stop questioning. -- Albert Einstein
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"A composer is a guy who goes around forcing his will on unsuspecting air molecules, often with the assistance of unsuspecting musicians." -- Frank Zappa
"Tobacco is my favorite vegetable." / "May your sh*t come to life and kiss you on the face." / "Scientology, how about that? You hold on to the tin cans and then this guy asks you a bunch of questions, and if you pay enough money you get to join the master race. How's that for a religion?" / "Communism doesn't work because people like to own stuff." / "There are three things that smell of fish. One of them is fish. The other two are growing on you!" / "Jazz is not dead, it just smells funny." / "The creation and destruction of harmonic and 'statistical' tensions is essential to the maintenance of compositional drama. Any composition (or improvisation) which remains consonant and 'regular' throughout is, for me, equivalent to watching a movie with only 'good guys' in it, or eating cottage cheese." / "Remember there's a big difference between kneeling down and bending over." / "The most important thing to do in your life, is to not interfere with somebody else's life." / "Rock journalism is people who can't write, interviewing people who can't talk, in order to provide articles for people who can't read." -- Frank Zappa
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