You're reviving a
three years old post concerning version 2.12.941 (or v. 2.13) and - at the same time -
don't give any info on the type of movie-file and subs you're using, nor concerning your BS.Player's version/build!
Several options/settings:
(rightclick >) Options > Preferences ...
...Subtitles [Subtitles properties]:
____ [ ] "Subtitles disabled"
____ [ ] "Use new subtitle parser/renderer"
____ [ ] "Disable embedded subtitles"
...Subtitles [VobSub]:
____ [ ] "Enable VobSub support"
...Filter management [General]
____ [ ] Allow intermediate filters
____ [ ] Enable advanced graph building
and with video file loaded
(note this is an example depending on the filter/codec used for playback by BS.Player and assuming that is ffdshow-filter):
(rightclick >) Options > Filters > Advanced
click on the [+] in front of "ffdshow Video Decoder"
click on "ffdshow"
in the middle column select "Subtitles" and verify the settings.