Yeah, I supposed was a skin issue. I use an "argentinian" skin posted in a local forum, because it's the only one where everything works fine (mini JV, tunnel view, TTS voices, etc...well, except this issue with the selecting type of radars). Now, I follow a simple principle: If it works, don't changed it.
I never used dimkaWa skin, I will try.

The commands you suggest for the sys.txt I suppose are for the sound/voice warnings (with that I don't have any problem). What I can´t do is select what to see at screen. Thank you very much for your advices!! Regards.