Still help on Roland Prelude (program change)

[SunBlack]

Following my unreplied topic viewtopic.php?f=6&t=41384 i experienced another issue:
Even if i set program change off on my Triton LE and on the Prelude ("System" menu), on resettting the countbar on the Triton sequencer or changing page on "part view" on the Prelude, the sound i preselected on the Prelude is resetted, changing on default sound.
How resolve?
Thanks.