Page 1 of DVD player screen size flicker driving me nuts!

hi everyone,

i have a cambridge audio 77 dvd player and i love it, apart from one thing - on most dvds it keeps switching the TV (JVC 28" widescreen) from panoramic to full, even when i pre select panoramic instead of auto. the dvd player is set to "wide" but also has options of ps and lb, neither of which stop the problem. >:(

it flicks constantly on the dvds it does this on, its very annoying, does anyone have any ideas what i can do? thanks. :D