Please do not use capital letters, there is no need to shout. Also the described problems has nothing to do with the burner or media, so there is no need to upgrade the firmware or change the media.
The problem hapigoluki has is simply that he selects to burn a DVD-Video, which needs the .ifo and .vob files which you see on any pressed DVD. If your DVD-Player supports it, burn a data DVD containing the .mpg and .avi files. In Nero you have to select DVD-ROM (ISO).
In case your DVD-Player does not support playing .mpg and .avi files you have to convert the files to DVD format, but that is a different story.