Unfortunately there has been a very persistent bug re online subtitles (as you can read from
this thead.) This was only definitively fixed rather recently. So I would advise you to uninstall the version you now have and download and install the most recent free version.
(Note: upon installation I would BS.Player allow to connect to the internet and internally install its preferred codecs/filters. Internally meaning: for use by BS.Player only and not interfering with your system's codecs/filters.)
With respect to online subtitles there is a working remedy/work-around (for movies < 6 hours) for not quite up-to-date BS.Player versions, i.e.:
(rightclick >) Options > Preferences > Subtitles > [Online subtitles]
and there insert a time value of 360 minutes in the box of "
Download only if movie is longer than (min)".
Other "connecting-to-the-internet"-related settings are (apart from those asked and selected by you at first installation):
(rightclick >) Options > Preferences > General [General settings]
[
v] Check for new version of BS.Player at program startup
and
(rightclick >) Options > Preferences > Audio
[
v] CDDB enabled
A false impression of connection to the internet may be given if
[
_] Don't use WinLIRC isn't selected under
(rightclick >) Options > Preferences > General [General settings]
(Maybe read this:
Frequently asked questions - BS.Player wiki)
