Victor,

What is the format of the clips you are trying to burn?
Do you have the "klite codec" pack?


I use format factory to reformat clips to the way I want them such as "avi to mp4" and so on.

I use the "infrarecorder" if I want to burn something.

Both are freeware and can be found with google.

Let us know some more specifics such as mac or pc and we will try and help.