What´s Wtong Here?

Ok, this is my little piece of script. I have attached it to a radio button component, so that it reacts to the selected one; if "blancas" is selected, just return some value to "metros" if "amarillas" is selected, a different value is assingned to metros", but what´s going on? if i select "amarillas" radio button, this value doesn´t change....

Please take 5 minutes and help me, I´m stucked!


onClipEvent (enterFrame) {
if (blancas=true) {
_root.metros = 388;
_root.tee._y = 329;
_root.tee._x = 385;
} else if (blancas=true) {
_root.metros = 371;
_root.tee._y = 329;
_root.tee._x = 385;
}
}