sounds like the key press is coming after the greeting has terminated... you can tack on some silence to the end of the greeting to give yourself more time or, probably better, have the greeting repeat once - on the greetings page at the bottom there is an option for repeating the greeting X times and including Y seconds of silence before it repeats. If you have a configuration where you're expecting user input it's always good to have several seconds of additional greeting text (i.e. "or you can stay on the like to reach an operator...") or silence after the last key option is voiced.
