and this works great with two monitors (animating with moho it's so comfortable

today i connected my tv with a s-video/rca adapter. but the card doesn't recognize the tv. i have done everything, but the screen still black.
does somebody know if its possible connect 2 screens and 1 tv?
am i doing something wrong, or it's just impossible?
google and the official pages haven't helped too much, so i decided go with the experts...