I tried a simple script based on the documentation. http://drupal.org/node/1079360
$prompt = 'Please enter your phone number after the beep';
$script->addGetInput($prompt);
$script->addSay("You typed %input_digits");
$script->addHangup();It asks me for the number and then gives the response "We're sorry, an application error has occurred."
It gives the same result for the sample weather report script, it allows me to enter a zip code and then gives the same error message.