Sometimes the servers of getsubtitles.com and/or opensubtitles.org don't deliver as expected.
These are providers which are independent from BS.Player and over which BS.Player-team has no control.
I suppose that at (rightclick >) Options > Preferences > Subtitles > [Online subtitles]
a subs-folder is defined in the white box at the right of "[ ] Save downloaded subtitles to"?
Is this same folder also defined as a "Subtitles folder" under Subtitles > [Subtitle properties]?