Font not showing up [renamed]

hello
I am new to this forum and to flash in general… my question is probably really dumb but i cannot figure it out …
I tried to follow the animated button tutorial and it is all ok
until i decided to modify it a bit and add some text and a mask to it …
for some reason when i preview (ctrl-enter) the movie the mask hides the text but reveals the button …
I hava no clue why it behaves this way …
<here> is the souce file

could someone take a look … thank you