[Hampshire] Codecs

Hi all

I truly hate codecs - they seem to be the bane of my life. I have a 60 minute DivX file that I want to burn to DVD but my software (Vista DVD maker and k3b) don't seem to allow it. Is this because I don't have the right codec (doubt it because I can play the file in totem) - or have I missed something obvious?

Cheers
Rob