The control is under setup, it probably says auto.
bewteen the double colons <::>; you have to press a button on the remote. between pointy brackets [<>], is an action you need to take.
I think that you have tried to use the subtitle button, it should say what the setting is & you usually have the ability to
As I check it after some reseacrh its shows that Go-Video Inc. is already out of business because of there profit loss last year and even their website is not operational anymore as of this moment..