Subtitles:*.rar with *.idx

[ewur]

Hi, before I used PowerDVD and now I switched to BSPlayer(v.2.1)... All is ok, I like it, but compressed subtitles don't work now! Subtitles consist 2 files(vobsub):
subtitle.rar
subtitle.idx
And name is exactly same as movie name, its not reason! With PowerDVD before it worked and I hadnt problems! Now I tried like before - rar file with idx file and no result. Then I unrared rar file(huge *.sub file, about 9 megas!), however, it doesnt work! What the problem? Please, help me, its only problem with BSPlayer! I dont want switch back to PowerDVD...

Edit: from BSPeter post - ...In this connection note, that there may arise conflicts if there are more programs/utilities installed that can display subtitles, like BSPlayer itself, VobSub/VSFilter and e.g. ffdshow (which can also display subtitles)... I'm not english, so I need those - VobSub/VSFilter and e.g. ffdshow too(Yes, I have)? But what are these other programs that may arise conflicts? Like I said, had PowerDVD(now uninstalled)...