Problem with exporting flash movie

I’m simply exporting my flash movie as I always do, but now, when I go to export, the “info…” button next to the version selcetion pull down is greyed out (nomatter what version i select). In the past, I’m pretty sure I used this button to get to a setting called “smooth”, which i need to do now. Any clues why this button has mysteriously become grey now?

Thanks in advance!!!