Ok i discovered how it works Slovenian subtitles on Total TV in stb 910HD.. with NLB 9341

1. go to one channel from Total TV, set subtitles on Slovenian.
2. go to audio menu (bottom right button) and set to another audio channel - Bolgarian, Croatinan, Srbian.... and after 5 sec set back to Slovenian audio and subtitles come on screen.

Bad things about this : if some channel use only one audio track, this is not working - subtitles doesnt work...

Any other solution about that??