Frame "label" causing code not to work

when i use a frame label in a bit of code it dusnt work… when i change it to frame number it works… can anyone explain this…

this is a problem primarily becos im in the development stage and labels save time and confusion when adjusting timelines

im typing them in manually often (normal mode), so what am i doing wrong…

eg… with 2 mc’s on main timeline - from button in mc ‘c1’…

on (rollOver) {
with (_root.c2) {
if (_currentFrame==“full”) {
gotoAndPlay(“down”);
}
}
}

(where ‘full’ is exactly what appears in the frame label field)

dusnt work ? - code produces no response at all

----------------- whereas…

on (rollOver) {
with (_root.c2) {
if (_currentFrame==10) {
gotoAndPlay(“down”);
}
}
}
works fine ?

any advice much appreciated…

ian