.mkv external subtitle file problem

[Techflaws]

When  .mkv file have integrated subtitles, wdtv live don’t show  external .srt subtitles file with the same name.

Actually it does. As I’ve just verified

movie.mkv ← idx/subs 1-4

movie.srt    ← srt sub 1

allows to select between 5 subtitle streams all of which are displayed.