First, let me clarify; I am using DVDA Studio that came with Movie Studio 4.0.
I am using Ritek -R media.
After my last post, I made three different burns of the same avi file that did not work in my customers player and this time I used MyDVD, Studio 9 and Expression to burn these, (testing my theory that maybe the complexity of the menu could be the problem). This time she reported that all 3 played exactly the same way; the menu came up like it was supposed to but when she played the movie, it skipped through some of the pictures, (this was a photo to dvd project). With the DVDA Studio project, the player had displayed "Loading...." and never came up at all.
The thing that has me baffled is this is not the first project I have done for her but it is the first project that wouldn't play. I did a project for her a couple of months ago (photo to dvd) that played fine on her player. There was no difference in the media or burner, the only difference was that the other project was completely put together and rendered as an avi in Studio 9 then the menu added and burned with Sonic MyDVD. This project was put together in Movie Studio 4.0, rendered as an avi then burned with DVD Studio the first time, and the 3 others as described above the second time and none of them played correctly.
Any ideas?

What is the brand and model number of the player she is using? You can enter this information at this site:

DVDrHelp Compatibility Guide

to discover known issues with almost any brand and model DVD player.

The software actually used to burn the disc probably makes the least difference (assuming that the software is compatible with your burner). The more usual problems are caused by the authoring software, the type of media used, and (some people think) the bitrate used for encoding.

You say that the "only" difference was that the project that worked was produced using MyDVD and another in Studio 9. Are you sure that these are the only differences? Did you use the same brand and type of media? This is by far the most likely cause of the problem. Even if you still use the same brand, but you are now using 4x instead of 2x or something like that, you can have compatibility problems.

Did you use the same bitrate? At what bitrate is the "problem" disc encoded? Those people that believe that encoding at high bitrates causes compatiblity problems generally advise not to encode at higher than 7,000 kbps average bitrate, and to keep the maximum at or below 8,000 kbps.

There is quite a bit of anecdotal evidence (although as yet, no hard proof backed up by testing) that encoding at higher bitrates may cause some discs to not play, or only play during portions of the disc, and only on some DVD players. There is sort of an urban legend quality to this particular issue, so don't hold me to it. If you have the time, and you can spare another disc, try taking your existing project and re-encoding at a lower bitrate, and then burn the disc and see if it plays. Let us know the results.

I've found version 2.0 to have compatibility problems with some players. I've gone back to version 1.0 until they get it fixed.

I've found version 2.0 to have compatibility problems with some players.

Are you sure that the problem is with 2.0? If you look at my posts, you will see that I bitch and moan about DVDA more than just about anyone, and it has lots of things that need fixing. However, I have never had ANY compatibility problems that I could trace to how it authors a disk. Not to say such a problem doesn't exist, only that I haven't found it, and haven't seen any hard evidence of it in the posts on this forum.

You might want to look at changing media. Going back to 1.0 is a real step backwards -- that was a truly horrible piece of software.

No it is definately 2.0. I created a few different jobs in 2.0 with the same results. I reauthored the same project in 1.0 and it was fine.

It is only one player that the problem shows up with, a Koss that is a couple of years old.