avi2dvd won't load mkv or ogm files

[nikkio3000]

hi when i try to load mkv or ogm files into avi2dvd it freezes and says invalid file everytime with different mkv or ogm files , so i havent converted any ogf the types yet help please hi when i try to load mkv or ogm files into avi2dvd it freezes and says invalid file everytime with different mkv or ogm files , so i havent converted any ogf the types yet help please