Changing dynamic text color? tweens?

anyone know how? the mc tween doesn’t seem to work (colorTo), also tried embedding it in another movie clip, and tween that clip but still no joy? any ideas?

item_mc.main_btn.onRollOver = function(){
trace(“coloring”);
item_mc.textclip.species_txt.text.color = 0xff0000;
}

also tried…

item_mc.main_btn.onRollOver = function(){
trace(“coloring”);
item_mc.textclip.species_txt.color = 0xff0000;
}

and the colorTo tweens aswell…