OK Solved,
As I wrote it was a bug, I solved this by:
I created a 12th custom sound to cfgRadio in Description and stringtable.
It was playing.
After I deleted the earlier not working sound file from description and stringtable, the new created ogg was played still. So everything is good
;D
Then I have got another messed up subtitles from stringtable
(I mean after the proper subtitle there was some words and letters from previous subtitles), I solved that by:
I rewrited the subtitles to blah blah, and changed the STRM's order.
Played the mission.
After I rewrited the original subtitles and then there were no messed up words...
So we have some buggies here, I wish you avoid this!!!
bye