Mkv with subtitles

I have a mkv. file that I’m trying to convert. My vlc player clearly states that there are subtitles which I have watched. When I try to convert ConvertX DVD says there are no subtitles internal or external. Any suggestions. Thanks

[B]Matroska[/B] ( mkv) is an open source container format. I think this format might need an update in ConvetXtoDVD, I am not sure though, have you tired VSO support, they are excellent.:iagree: