dvd burned but no image in it!

Hi, I´m just trying to burn my first dvd.

I had my preferences set and checked up every bit I played simulator and...,burned sucesfully.
That´s what it said. The truth is that when I play it no image appears just a grey. If I check in the finder the dvd contains the data and has got the ts files.

I any obvious mistake that I made?

Please would be great to learn more of this programme.
Could anybody give me a clue?

Sounds like a blank menu is showing up as the first play. You can change the background of the default menu in the prefs but you'll want to change the first play of the project to avoid this problem or add a menu!