Uninstall nimo. Vobsub not needed for .srt subtitles either. Ffdshow in principle replaces codecs, so you wouldn't need ffdshow if you install (individual!) codecs.
Problem probably caused by the fact that .srt subtitles can be played by:
BSPlayer itself AND by DVobsub (AND maybe also by ffdshow; don't know that for sure as I don't use ffdshow myself). How is your PC to know which one to use?
Too much eating makes you sick; this is also valid for your PC!
Read my Help2Help post (link at bottom) and especially its item 4.
(This also has a link to
adicoto's list of codecs.)