there was an error in PlayMP3 did not run, it changed, now it works
function STTS.PlayMP3(pathToMP3,freqs,modulations, volume,name, coalition )
local cmd = string.format("start /B /min \"%s\" \"%s\\%s\" \"%s\" %s %s %s %s \"%s\" %s", STTS.DIRECTORY, STTS.DIRECTORY, STTS.EXECUTABLE, pathToMP3, freqs, modulations, coalition,STTS.SRS_PORT, name, volume )
env.info("[DCS-STTS] PlayMP3 Command :\n" .. cmd.."\n")
os.execute(cmd)
end