I am trying to use DVDMaestro version 2.9 and I am getting this Error Message on start up   :  \"Real Time Prewiew functionality will not be available because no decoders have been detected\"

I do not know if this is the reason but the programm does not accept any of the video files I have try to import as Media Asset.
If for example I try to import a .mpa file for sound everything is OK. but when I try to import a .m2v or even a .mpg file of video then it reject it with the following Error Message :  \"Media Not Supported Error (0xc10b0002)\"