If not already done at installation, allow BS.Player to install the codecs/filters it needs, by running
codecmanager.exe which you can find in BS.Player's installation folder
(default C:\Program Files\Webteh\BSPlayer [Pro]\).
If that doesn't help I would indeed try to uninstall K-lite.
(I havn't seen your fellow countryman
adicoto on this forum for quite a while now, though I've seen him on
this forum since.)